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. A vehicle transmission includes a housing, a transmission input shaft, a motor output shaft, and two epicyclic gear trains. Wherein the transmission input shaft is rotationally connected with the shell; an output shaft of the motor is rotationally connected with the shell; planet carriers and gear rings of the epicyclic gear trains are rotationally connected with the shell, the planet carriers are in transmission connection with an input shaft of the transmission and in transmission connection with an output shaft of the motor, axes of planet gears of the two epicyclic gear trains are relatively fixed, the two gear rings are coaxially fixed, and the gear rings are used for being in transmission connection with an axle. The gear number ratios of the sun gears of the two epicyclic gear trains to the corresponding gear rings are different, and the two sun gears are separately fixed to the shell. The vehicle transmission is used for changing the transmission ratio between the output shaft of the motor and the wheels and changing the transmission ratio between the output shaft of the engine and the wheels, and 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 of 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 and two epicyclic gear trains. The transmission input shaft is rotatably connected to the housing. The motor output shaft is rotatably connected to the housing. The planet carrier and the ring gear of each epicyclic gear train are rotatably connected to the housing. The planet carrier is in transmission connection with the transmission input shaft and the motor output shaft. The axes of the planet gears of the two epicyclic gear trains are relatively fixed. The two ring gears are coaxially fixed. The ring gears are used to be in transmission connection with the axle. The sun gears of the two epicyclic gear trains have different gear ratios with the corresponding ring gears. The two sun gears are separably fixed to the housing.

[0005] The vehicle transmission provided by the present application comprises two epicyclic gear trains. The planet carrier of each epicyclic gear train can rotate relative to the housing under the driving of the transmission input shaft and the motor output shaft. The ring gear of each epicyclic gear train can rotate relative to the housing under the driving of the planet carrier, so that the ring gear can drive the axle to rotate relative to the vehicle body. By making the sun gears of the two epicyclic gear trains have different gear ratios with the corresponding ring gears, and the two sun gears are separably fixed to the housing, the rotation speed ratio of the planet carrier and the ring gear can be adjusted. In this way, in the case of the same rotation speed of the motor, the rotation speed of the axle relative to the vehicle body can be changed by adjusting the connection state of the two sun gears and the housing, so that the vehicle speed is changed. Therefore, in the case of needing to change the vehicle speed, the rotation speed of the motor can remain unchanged, the vehicle speed can be changed by adjusting the connection state of the two sun gears and the housing, and the energy consumption can be reduced.

[0006] In combination with the first aspect, in some possible implementation manners, one of the planet carrier, the sun gear and the ring gear movably has 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 planet carrier, the sun gear and the ring gear to fix the planet carrier, the sun gear and the ring gear. In the separation position, the other one of the planet carrier, the sun gear and the ring gear is separated from the locking member.

[0007] The locking member is arranged, so that the planet carrier, the sun gear and the ring gear can rotate synchronously relative to the housing, more speed ratios can be realized between the planet carrier and the ring gear, the gearshift of the vehicle transmission is increased, and the adaptability of the vehicle is improved.

[0008] In some possible implementation manners, in combination with the first aspect and the foregoing implementation manners, the planet carrier comprises a mounting shaft; the number of the planet gears of the two epicyclic gear trains is the same, and the planet gears of one epicyclic gear train are arranged in one-to-one correspondence with the planet gears of the other epicyclic gear train, and the corresponding two planet gears are sleeved on the same mounting shaft.

[0009] By sleeving the corresponding two planet gears on the same mounting shaft, the axes of the planet gears of the two epicyclic gear trains are relatively fixed, and the structure is relatively simple.

[0010] In some possible implementation manners, in combination with the first aspect and the foregoing implementation manners, the vehicle transmission further comprises a fixing member, the fixing member is movably arranged on the housing, the fixing member has a connected position and a disconnected position, in the connected position, the fixing member is connected with the sun gear to fixedly connect the sun gear with the housing, and in the disconnected position, the fixing member is separated from the sun gear to disconnect the fixed connection between the sun gear and the housing.

[0011] By movably arranging the fixing member on the housing, the fixing member can be connected or separated from the sun gear, the sun gear and the housing are fixedly connected in a separable manner, and the structure is relatively simple.

[0012] In some possible implementation manners, in combination with the first aspect and the foregoing implementation manners, along the axial direction of the epicyclic gear train, the two epicyclic gear trains are located on the same side where the fixing member is arranged; the transmission input shaft is coaxial with the epicyclic gear train, a first end of the transmission input shaft is located on the side of the two epicyclic gear trains close to the fixing member, the first end of the transmission input shaft is rotatably connected with the housing, and a second end of the transmission input shaft extends to the other side of the two epicyclic gear trains through the two sun gears, and the second end of the transmission input shaft is fixedly connected with the planet carrier.

[0013] In this way, the planet carrier is rotatably connected with the housing through the transmission input shaft, along the axial direction of the epicyclic gear train, the first end of the transmission input shaft and the fixing member are located on the same side of the two epicyclic gear trains, the first end of the transmission input shaft is rotatably connected with the housing, the second end extends to the other side of the two epicyclic gear trains through the two sun gears, and is fixedly connected with the planet carrier, that is, the part of the planet carrier for being connected with the transmission input shaft and the fixing member are located on opposite sides of the two epicyclic gear trains, which makes the arrangement of the planet carrier not easily affect the arrangement of the fixing member, and the planet carrier does not easily interfere with the fixing member, thereby facilitating the arrangement of the fixing member.

[0014] With reference to the first aspect and the above implementation manner, in some possible implementation manners, the vehicle transmission further includes a connecting piece and a second connecting shaft, the connecting piece is arranged at one side of the two epicyclic gear trains away from the fixed piece, one end of the connecting piece is fixedly connected with the ring gear, and the other end of the connecting piece extends at the central axis of the epicyclic gear trains; the second connecting shaft is coaxial with the epicyclic gear trains, one end of the second connecting shaft is connected with the other end of the connecting piece, and the other end of the second connecting shaft extends away from the epicyclic gear trains and is rotationally connected with the housing.

[0015] In this way, the ring gear is rotationally connected with the housing through the connecting piece and the second connecting shaft, the connecting piece and the fixed piece are respectively arranged at opposite sides of the two epicyclic gear trains, and the second connecting shaft and the fixed piece are respectively arranged at opposite sides of the two epicyclic gear trains, so that the arrangement of the connecting piece and the second connecting shaft does not easily affect the arrangement of the fixed piece, the connecting piece and the second connecting shaft do not easily interfere with the fixed piece, and the arrangement of the fixed piece is facilitated.

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

[0017] By fixing one of the transmission input shaft and the motor output shaft coaxially with the carrier, transmission connection between the one of the transmission input shaft and the motor output shaft and the carrier is facilitated. By fixing the first gear coaxially with the transmission input shaft and the second gear coaxially with the motor output shaft, and by transmission connection between the first gear and the second gear, the other of the transmission input shaft and the motor output shaft is in transmission connection with the carrier through the one of the transmission input shaft and the motor output shaft, and transmission connection between the other of the transmission input shaft and the motor output shaft and the carrier is facilitated.

[0018] With reference to the first aspect and the above implementation manner, in some possible implementation manners, the axial direction of the epicyclic gear train is parallel to the horizontal direction.

[0019] By arranging the axial direction of the epicyclic gear train to be parallel to the horizontal direction, the vehicle transmission occupies a smaller space in the horizontal direction, and can better match the space in the engine compartment, thereby facilitating the arrangement of the vehicle transmission in the engine compartment.

[0020] In a second aspect, the present application provides a power system, the power system including an engine, a first axle, and the vehicle transmission provided in the first aspect and the above implementation manners of the present application. The ring gear 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 an output shaft of the engine.

[0021] The power system provided in the application, including the vehicle transmission provided in the first aspect and the implementation manners of the application, can achieve the same technical effect, that is, can reduce energy consumption.

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

[0023] The vehicle provided in the application, including the power system provided in the second aspect of the application, can achieve the same technical effect, that is, can reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the 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 application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

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

[0026] Figure 2 is a structural schematic diagram of the connection between the second motor, the third reduction gear and the fourth reduction gear in the embodiment of the application.

[0027] MARKED FOR EXPLANATION:

[0028] 1, vehicle transmission; 101, transmission input shaft; 102, motor output shaft; 103, planet carrier; 1031, mounting shaft; 1032, connecting part; 104, ring gear; 105, planetary gear; 106, sun gear; 107, locking piece; 108, first fixing piece; 110, connecting piece; 111, second connecting shaft; 112, first gear; 113, second gear; 114, first reduction gear; 115, second reduction gear; 116, first output shaft; 117, second fixing piece; 118, first motor; 3, engine; 4, first clutch; 5, second motor; 6, third reduction gear; 7, fourth reduction gear; 8, second output shaft. DETAILED DESCRIPTION

[0029] The technical solutions in the application will be described in detail below with reference to 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 the application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the application.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] This application provides a vehicle, which can be of various types, such as a sedan, off-road vehicle, or sport utility vehicle (SUV).

[0035] Please refer to Figure 1 The vehicle in this embodiment includes a power system, which includes a vehicle transmission 1, an engine 3, and a first axle. The vehicle transmission 1 includes a housing, a transmission input shaft 101, a motor output shaft 102, and two planetary gear trains.

[0036] Please refer to Figure 1 In this embodiment, the transmission input shaft 101 is rotatably connected to the housing. It should be noted that the axis of rotation of the transmission input shaft 101 relative to the housing is the axis of the transmission input shaft 101.

[0037] Please refer to Figure 1In the embodiment of the application, the transmission input shaft 101 has at least a connection state, in which the transmission input shaft 101 is in driving connection with the output shaft of the engine 3. In the connection 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 application, the power system further comprises a first clutch 4 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, in the case that the first clutch 4 is in the engaged state, the transmission input shaft 101 is in the connection state, in the case that 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] For reference Figure 1 In some embodiments of the application, in the connection state, the transmission input shaft 101 can be coaxially fixed with the output shaft of the engine 3.

[0039] For reference Figure 1 In the embodiment of the application, the vehicle transmission comprises a first motor 118, and the motor output shaft 102 is the output shaft of the first motor 118. It should be explained that the motor output shaft 102 is in driving connection with the housing, and the axis of the motor output shaft 102 relative to the housing is the axis of the motor output shaft 102.

[0040] For reference Figure 1 In the embodiment of the application, the planet carrier 103 and the ring gear 104 of the epicyclic gear train are in driving connection with the housing, the planet carrier 103 is in driving connection with the transmission input shaft 101 and the motor output shaft 102, the axes of the two epicyclic gear trains are fixed relative to each other, the ring gear 104 is in driving connection with the first axle, the two ring gears 104 are coaxially fixed, the two sun gears 106 of the two epicyclic gear trains have different gear ratios with the corresponding ring gears 104, and the two sun gears 106 are separably fixed with the housing.

[0041] In this way, the vehicle transmission 1 comprises two epicyclic gear trains, the planet carrier 103 of the epicyclic gear train is capable of rotating relative to the housing under the driving of the transmission input shaft 101 and the motor output shaft 102, the ring gear 104 of the epicyclic gear train is capable of rotating relative to the housing under the driving of the planet carrier 103, and the ring gear 104 is further capable of driving the first axle to rotate relative to the vehicle body. By making the number of teeth of the two sun gears 106 and the corresponding ring gears 104 different, and by making the two sun gears 106 and the housing separably fixed, the speed ratio of the planet carrier 103 and the ring gear 104 can be adjusted, so that the speed of the first axle relative to the vehicle body can be changed by adjusting the connection state of the two sun gears 106 and the housing without changing the speed of the motor, thereby reducing energy consumption.

[0042] Furthermore, in the embodiment of the present application, the transmission input shaft 101 is in transmission connection with the planet carrier 103, so that the two epicyclic gear trains can not only transmit the torque of the motor, but also transmit the torque of the engine 3, and the two epicyclic gear trains 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 diverse.

[0043] Please refer to Figure 1 It can be understood that, in the embodiment of the present application, the axes of the two epicyclic gear trains are the same. The axis of the epicyclic gear train, the axis of the planet carrier 103, the axis of the ring gear 104 and the axis of the sun gear 106 are the same. The planet carrier 103, the ring gear 104 and the sun gear 106 are in rotational connection with the housing, and the axis of the planet carrier 103 relative to the housing, the axis of the ring gear 104 relative to the housing and the axis of the sun gear 106 relative to the housing are the same as the axis of the epicyclic gear train. Generally, in some embodiments of the present application, the two epicyclic gear trains are arranged in the axial direction and are arranged in the housing.

[0044] In some embodiments of the present application, the axial direction of the epicyclic gear train is parallel to the horizontal direction. By making the axial direction of the epicyclic gear train parallel to the horizontal direction, the vehicle transmission 1 occupies less space in the horizontal direction, which can better match the space in the engine 3 cabin and facilitate the arrangement of the vehicle transmission 1 in the engine 3 cabin.

[0045] Please refer to Figure 1 It can be understood that, in the embodiment of the present application, the two ring gears 104 belong to the two epicyclic gear trains respectively, the two sun gears 106 belong to the two epicyclic gear trains respectively, and the two planet carriers 103 belong to the two epicyclic gear trains respectively.

[0046] Please refer to Figure 1It can be understood that, in the embodiment of the application, the planet carrier 103 is in transmission connection with the transmission input shaft 101 and the motor output shaft 102, and the motor output shaft 102 and the transmission input shaft 101 can drive the planet carrier 103 to rotate relative to the housing, thereby driving the ring gear 104 to rotate relative to the housing. The housing is relatively fixed to the vehicle body, and in the process of rotating the ring gear 104 relative to the housing, the ring gear 104 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 118 to the planet carrier 103, the transmission input shaft 101 can transmit the torque of the engine 3 to the planet carrier 103, the planet carrier 103 can transmit the torque of the motor output shaft 102 and the torque of the transmission input shaft 101 to the ring gear 104, and the ring gear 104 can transmit the torque of the planet carrier 103 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 114 and a second reduction gear 115, the first reduction gear 114 is coaxially fixed with the ring gear 104, the second reduction gear 115 is engaged with the first reduction gear 114, the second reduction gear 115 has more teeth than the first reduction gear 114, and the second reduction gear 115 is coaxially fixed with a first output shaft 116, and the first output shaft 116 is in transmission connection with the first axle. In this way, the vehicle transmission 1 is in transmission connection with the first axle through the first reduction gear 114 and the second reduction gear 115, and the second reduction gear 115 has more teeth than the first reduction gear 114, which can achieve the effect of speed reduction and torque increase.

[0048] Please refer to Figure 1 In some embodiments of the application, the first reduction gear 114 can be coaxially fixed with the second end of the second connecting shaft 111.

[0049] Please refer to Figure 1 It can be understood that, in the embodiment of the application, the two sun gears 106 are respectively fixed to the housing. For ease of understanding, the two sun gears 106 are respectively referred to as a first sun gear and a second sun gear, and the two sun gears 106 are respectively fixed to the housing, that is, the first sun gear is fixed to the housing, and the second sun gear is separated from the housing and can rotate relative to the housing, and the second sun gear is fixed to the housing, and the first sun gear is separated from the housing and can rotate relative to the housing.

[0050] Please refer to Figure 1In some embodiments of the present application, one of the carrier 103, the sun gear 106 and the ring gear 104 is movably provided with a locking member 107, the locking member 107 has a locking position and a separation position, in the locking position, the locking member 107 is connected to another one of the carrier 103, the sun gear 106 and the ring gear 104 to fix the carrier 103, the sun gear 106 and the ring gear 104, in the separation position, the other one of the carrier 103, the sun gear 106 and the ring gear 104 is separated from the locking member 107. By providing the locking member 107, the carrier 103, the sun gear 106 and the ring gear 104 can rotate synchronously relative to the housing, more speed ratios between the carrier 103 and the ring gear 104 can be achieved, the gear positions of the vehicle transmission 1 are increased, and the adaptability of the vehicle is improved.

[0051] For your convenience Figure 1 It can be understood that, in the embodiments of the present application, one of the carrier 103, the sun gear 106 and the ring gear 104 is movably provided with a locking member 107, the locking member 107 can move relative to one of the carrier 103, the sun gear 106 and the ring gear 104 to move to the locking position and the separation position, the locking position and the separation position are two positions of the locking member 107 relative to one of the carrier 103, the sun gear 106 and the ring gear 104. In the locking position, the carrier 103, the sun gear 106 and the ring gear 104 are fixed, in the separation position, the carrier 103, the sun gear 106 and the ring gear 104 can rotate relative to each other. For example, in some embodiments of the present application, the carrier 103 is movably provided with a locking member 107, the locking member 107 can move relative to the carrier 103 to move the locking member 107 relative to the carrier 103 to the locking position and the separation position, the locking position and the separation position are two positions of the locking member 107 relative to the carrier 103.

[0052] For your convenience Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a second clutch, the second clutch is arranged between any two of the carrier 103, the sun gear 106 and the ring gear 104, in the engaged state of the second clutch, the carrier 103, the sun gear 106 and the ring gear 104 are fixed, in the separated state of the second clutch, the carrier 103, the sun gear 106 and the ring gear 104 can rotate relative to each other. It can be understood that, in the embodiments of the present application, the locking member 107 is a pressure plate of the second clutch.

[0053] For your convenience Figure 1In some embodiments of the present application, the planet carrier 103 comprises a mounting shaft 1031; the number of the planet gears 105 of the two epicyclic gear trains is the same, and the planet gears 105 of one epicyclic gear train are arranged one by one corresponding to the planet gears 105 of the other epicyclic gear train, and the corresponding two planet gears 105 are sleeved on the same mounting shaft 1031. By sleeving the corresponding two planet gears 105 on the same mounting shaft 1031, the axes of the planet gears 105 of the two epicyclic gear trains are relatively fixed, and the structure is relatively simple.

[0054] Please refer to Figure 1 It can be understood that, in the embodiments of the present application, the corresponding two planet gears 105 respectively belong to the two epicyclic gear trains.

[0055] Please refer to Figure 1 In some embodiments of the present application, the corresponding two planet gears 105 are coaxial. In this way, the machining and manufacturing of the mounting shaft 1031 are facilitated, and the installation of the planet gears 105 on the mounting shaft 1031 is also facilitated.

[0056] Please refer to Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a fixing member (refer to the first fixing member 108 and the second fixing member 117 in the drawings), the fixing member is movably arranged on the housing, and the fixing member has a connected position and a disconnected position. In the connected position, the fixing member is connected with the sun gear 106 to fixedly connect the sun gear 106 with the housing, and in the disconnected position, the fixing member is separated from the sun gear 106 to disconnect the fixed connection between the sun gear 106 and the housing. By movably arranging the fixing member on the housing, the fixing member can be connected or separated from the sun gear 106, and the sun gear 106 is fixedly separable from the housing, and the structure is relatively simple.

[0057] Please refer to Figure 1 It can be understood that, in the embodiments of the present application, the fixing member is movably arranged on the housing, so that the fixing member can move relative to the housing to move to the connected position and the disconnected position, and the connected position and the disconnected position are two positions of the fixing member relative to the housing.

[0058] Please refer to Figure 1 In some embodiments of the present application, the vehicle transmission 1 further comprises a brake, the brake is arranged on the housing, the fixing member is a brake caliper of the brake, the brake caliper clamps a central shaft coaxially fixed to the sun gear 106 to fix the sun gear 106 with the housing, and the brake caliper is separated from the central shaft to enable the sun gear 106 to rotate relative to the housing.

[0059] Please refer to Figure 1In some embodiments of the present application, the number of fixing members is two, and the two fixing members are a first fixing member 108 and a second fixing member 117. The first fixing member 108 is arranged corresponding to the first sun gear, and the second fixing member 117 is arranged corresponding to the second sun gear.

[0060] Please refer to Figure 1 In some embodiments of the present application, the two epicyclic gear trains are located on the same side of the fixing member along the axial direction of the epicyclic gear train. The transmission input shaft 101 is coaxial with the epicyclic gear train. The first end of the transmission input shaft 101 is located on the side of the two epicyclic gear trains close to the fixing member. The first end of the transmission input shaft 101 is rotationally connected to the housing. The second end of the transmission input shaft 101 extends through the two sun gears 106 to the other side of the two epicyclic gear trains. The second end of the transmission input shaft 101 is fixedly connected to the carrier 103. In this way, the carrier 103 is rotationally connected to the housing through the transmission input shaft 101. The first end of the transmission input shaft 101 and the fixing member are located on the same side of the two epicyclic gear trains along the axial direction of the epicyclic gear train. The first end of the transmission input shaft 101 is rotationally connected to the housing. The second end extends through the two sun gears 106 to the other side of the two epicyclic gear trains and is fixedly connected to the carrier 103. That is, the part of the carrier 103 used to connect the transmission input shaft 101 is located on the opposite sides of the two epicyclic gear trains, respectively. This makes the arrangement of the carrier 103 less likely to affect the arrangement of the fixing member and less likely to interfere with the fixing member, facilitating the arrangement of the fixing member.

[0061] Please refer to Figure 1 In some embodiments of the present application, the output shaft of the engine 3 can be drivingly connected to the first end of the transmission input shaft 101 to drivingly connect to the carrier 103.

[0062] Please refer to Figure 1 In some embodiments of the present application, the carrier 103 includes a mounting shaft 1031 and a connecting portion 1032. The connecting portion 1032 is located on the side of the two sun gears 106 away from the fixing member. One end of the connecting portion 1032 is fixedly connected to the mounting shaft 1031, and the other end extends to the central axis of the epicyclic gear train and is fixedly connected to the second end of the transmission input shaft 101.

[0063] Please refer to Figure 1In some embodiments of the present application, the vehicle transmission 1 further comprises a connecting piece 110 and a second connecting shaft 111. The connecting piece 110 is arranged on the side of the two epicyclic gear trains away from the fixed piece. One end of the connecting piece 110 is fixedly connected with the ring gear 104, and the other end extends at the center axis of the epicyclic gear train. The second connecting shaft 111 is coaxial with the epicyclic gear train. One end of the second connecting shaft 111 is connected with the other end of the connecting piece 110, and the other end of the second connecting shaft 111 extends away from the epicyclic gear train and is rotationally connected with the housing. In this way, the ring gear 104 is rotationally connected with the housing through the connecting piece 110 and the second connecting shaft 111. The connecting piece 110 and the fixed piece are respectively arranged on opposite sides of the two epicyclic gear trains, and the second connecting shaft 111 and the fixed piece are respectively arranged on opposite sides of the two epicyclic gear trains. Therefore, the arrangement of the connecting piece 110 and the second connecting shaft 111 does not easily affect the arrangement of the fixed piece, and the connecting piece 110 and the second connecting shaft 111 do not easily interfere with the fixed piece, thereby facilitating the arrangement of the fixed piece.

[0064] For reference Figure 1 In some embodiments of the present application, the connecting piece 110 can be welded or integrally formed with the ring gear 104. In this way, the processing and manufacturing are facilitated.

[0065] For reference Figure 1 In some embodiments of the present application, the ring gear 104 can be connected with the first axle drive through the second end of the second connecting shaft 111.

[0066] For reference Figure 1 In some embodiments of the present application, the transmission input shaft 101 is coaxially arranged with the second connecting shaft 111. The second connecting shaft 111 is located on the side of the transmission input shaft 101 away from the fixed piece. The second clutch can be arranged between the ends of the transmission input shaft 101 and the second connecting shaft 111 that are close to each other. In this way, when the second clutch is in the engaged state, the planet carrier 103 and the ring gear 104 are fixedly connected through the second clutch, so that the sun gear 106, the ring gear 104 and the planet carrier 103 are locked. The second clutch can be arranged between the ends of the transmission input shaft 101 and the second connecting shaft 111 that are close to each other, thereby facilitating the arrangement of the second clutch and making the locking of the sun gear 106, the ring gear 104 and the planet carrier 103 more stable in the connected position.

[0067] For reference Figure 2In some embodiments of the present application, one of the transmission input shaft 101 and the motor output shaft 102 is fixed coaxially with the planet carrier 103, and the vehicle transmission 1 further comprises a first gear 112 and a second gear 113, the first gear 112 is in driving connection with the second gear 113, the first gear 112 is fixed coaxially with the transmission input shaft 101, and the second gear 113 is fixed coaxially with the motor output shaft 102. By fixing one of the transmission input shaft 101 and the motor output shaft 102 coaxially with the planet carrier 103, the driving connection between one of the transmission input shaft 101 and the motor output shaft 102 and the planet carrier 103 is facilitated. By fixing the first gear 112 coaxially with the transmission input shaft 101 and the second gear 113 coaxially with the motor output shaft 102, and driving the first gear 112 and the second gear 113, the driving connection between the other one of the transmission input shaft 101 and the motor output shaft 102 and the planet carrier 103 is facilitated.

[0068] Please refer to Figure 2 In some embodiments of the present application, the first gear 11 can be arranged at the first end of the transmission input shaft 101.

[0069] Please refer to Figure 1 In some embodiments of the present application, the first gear 112 is in meshing engagement with the second gear 113. In this way, the driving connection between the first gear 112 and the second gear 113 is facilitated. In some embodiments of the present application, the transmission input shaft 101 is fixed coaxially with the planet carrier 103, and the number of teeth of the first gear 112 is greater than the number of teeth of the second gear 113. In this way, the first gear 112 and the second gear 113 can achieve the effect of speed reduction and distance increase. In some embodiments of the present application, the motor output shaft 102 is fixed coaxially with the planet carrier 103, and the number of teeth of the first gear 112 is less than the number of teeth of the second gear 113. In this way, the first gear 112 and the second gear 113 can achieve the effect of speed reduction and distance increase.

[0070] Please refer to 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 fixed relative to the vehicle body, and the output shaft of the second motor 5 is in driving connection with the second axle. In this way, it is beneficial to improve the escape ability of the vehicle.

[0071] Please refer to Figure 2In some embodiments of the present application, the power system further comprises a third reduction gear 6 coaxially fixed with the output shaft of the second motor 5, and a fourth reduction gear 7 engaged with the third reduction gear 6, the fourth reduction gear 7 having a larger number of teeth than the third reduction gear 6, and the fourth reduction gear 7 being coaxially fixed with a second output shaft 8, and the second output shaft 8 being in driving connection with the second axle. In this way, the third reduction gear 6 and the fourth reduction gear 7 can achieve the effect of speed reduction and distance increase.

[0072] Please refer to ​ and ​ In some embodiments of the present application, the first axle is the front axle and the second axle is the rear axle. In some embodiments of the present application, the first axle can also be the rear axle and the second axle can be the front axle.

[0073] The various working conditions of the power system in some embodiments of the present application are described in detail below.

[0074] Referring to Table 1, ​ and Table 1, in some embodiments of the present application, the power system has a pure electric driving condition, a range-extended driving condition and a parallel driving condition.

[0075] In the pure electric driving condition, the first clutch 4 is in a separated state, the engine 3 is not working, and the first motor 118 and the second motor 5 are both used as electric motors. The motor output shaft 102 drives the second gear 113 to rotate relative to the housing, the second gear 113 drives the first gear 112 to rotate relative to the housing, the first gear 112 drives the transmission input shaft 101 to rotate relative to the housing, the transmission input shaft 101 drives the planet carrier 103 to rotate relative to the housing, the planet carrier 103 drives the ring gear 104 to rotate relative to the housing, the ring gear 104 drives the first reduction gear 114 to rotate relative to the housing, the first reduction gear 114 drives the second reduction gear 115 to rotate relative to the housing, and the second reduction gear 115 drives the first axle to rotate relative to the vehicle body through the first output shaft 116. 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.

[0076] In some embodiments of the present application, the pure electric driving condition further comprises 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.

[0077] In the first-gear pure electric driving condition, the locking member 107 is in the separated position, the planetary carrier 103, the ring gear 104 and the sun gear 106 can rotate relatively, the first fixing member 108 is in the disconnected position, the first sun gear can rotate relatively to the housing, the second fixing member 117 is in the connected position, the second sun gear is relatively fixed to the housing, the motor output shaft 102 rotates forward, and the output shaft of the second motor 5 rotates forward.

[0078] In the first-gear reverse pure electric driving condition, the locking member 107 is in the separated position, the first fixing member 108 is in the disconnected position, the second fixing member 117 is in the connected position, the motor output shaft 102 rotates reversely, and the output shaft of the second motor 5 rotates reversely. In the case that the motor output shaft 102 rotates reversely, the rotating direction of the motor output shaft 102 relative to the stator of the first motor 118 is opposite to that in the case that the motor output shaft 102 rotates forward, and in the case that the output shaft of the second motor 5 rotates reversely, the rotating 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 that the output shaft of the second motor 5 rotates forward.

[0079] In the second-gear pure electric driving condition, the locking member 107 is in the locked position, the first fixing member 108 is in the disconnected position, the second fixing member 117 is in the disconnected position, the motor output shaft 102 rotates forward, and the output shaft of the second motor 5 rotates forward. The planetary carrier 103, the ring gear 104 and the sun gear 106 rotate synchronously relative to the housing under the driving of the motor output shaft 102.

[0080] In the second-gear reverse pure electric driving condition, the locking member 107 is in the locked position, the first fixing member 108 is in the disconnected position, the second fixing member 117 is in the disconnected position, the motor output shaft 102 rotates reversely, and the output shaft of the second motor 5 rotates reversely. The planetary carrier 103, the ring gear 104 and the sun gear 106 rotate synchronously relative to the housing under the driving of the motor output shaft 102.

[0081] In the third-gear pure electric driving condition, the locking member 107 is in the separated position, the planetary carrier 103, the ring gear 104 and the sun gear 106 can rotate relatively, the first fixing member 108 is in the connected position, the first sun gear is relatively fixed to the housing, the second fixing member 117 is in the disconnected position, the second sun gear can rotate relatively to the housing, the motor output shaft 102 rotates forward, and the output shaft of the second motor 5 rotates forward.

[0082] In the third-gear reverse pure electric driving condition, the locking member 107 is in the separated position, the first fixing member 108 is in the connected position, the second fixing member 117 is in the disconnected position, the motor output shaft 102 rotates reversely, and the output shaft of the second motor 5 rotates reversely.

[0083] In 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 transmission input shaft 101 drives the planet carrier 103 to rotate relative to the housing, the planet carrier 103 drives the ring gear 104 to rotate relative to the housing, the ring gear 104 drives the first reduction gear 114 to rotate relative to the housing, the first reduction gear 114 drives the second reduction gear 115 to rotate relative to the housing, and the second reduction gear 115 drives the first axle to rotate relative to the vehicle body through the first output shaft 116. The first motor 118 acts as a generator, and in the process of the transmission input shaft 101 rotating relative to the housing, the first gear 112 and the second gear 113 drive the motor output shaft 102 to rotate relative to the housing, and then drive the motor output shaft 102 to rotate relative to the stator of the first motor 118, so that the first motor 118 generates electricity. The second motor 5 is a motor, and the output shaft of the second motor 5 rotates forward, and the second motor 5 drives the third reduction gear 6 to rotate relative to the vehicle body.

[0084] In some embodiments of the present application, the range extending driving working condition further includes a first range extending driving working condition, a second range extending driving working condition and a third range extending driving working condition.

[0085] In the first range extending driving working condition, the locking piece 107 is in the separated position, the planet carrier 103, the ring gear 104 and the sun gear 106 can rotate relative to each other, the first fixed piece 108 is in the disconnected position, the first sun gear can rotate relative to the housing, and the second fixed piece 117 is in the connected position, and the second sun gear is fixed relative to the housing.

[0086] In the second range extending driving working condition, the locking piece 107 is in the locked position, the first fixed piece 108 is in the disconnected position, and the second fixed piece 117 is in the disconnected position. The planet carrier 103, the ring gear 104 and the sun gear 106 are driven by the transmission input shaft 101 to rotate relative to the housing synchronously.

[0087] In the third range extending driving working condition, the locking piece 107 is in the separated position, the planet carrier 103, the ring gear 104 and the sun gear 106 can rotate relative to each other, the first fixed piece 108 is in the connected position, the first sun gear is fixed relative to the housing, and the second fixed piece 117 is in the disconnected position, and the second sun gear can rotate relative to the housing.

[0088] In the parallel driving mode, 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 first motor 118 and the second motor 5 are both used as electric motors, and the first motor 118 and the second motor 5 are both rotating in the forward direction. The motor output shaft 102 rotates relative to the housing, and the motor output shaft 102 and the transmission input shaft 101 jointly drive the planetary carrier 103 to rotate relative to the housing. For example, in the process in which the motor output shaft 102 rotates relative to the housing, the first gear 112 and the second gear 113 apply a torque to the transmission input shaft 101, the direction of the torque is the same as the direction of the torque applied by the output shaft of the engine 3 to the transmission input shaft 101, that is, the torque of the motor output shaft 102 and the torque of the output shaft of the engine 3 are combined at the transmission input shaft 101, so that the transmission input shaft 101 rotates relative to the housing, and then the transmission input shaft 101 drives the planetary carrier 103 to rotate relative to the housing, the planetary carrier 103 drives the ring gear 104 to rotate relative to the housing, the ring gear 104 drives the first reduction gear 114 to rotate relative to the housing, the first reduction gear 114 drives the second reduction gear 115 to rotate relative to the housing, and the second reduction gear 115 drives the first axle to rotate relative to the vehicle body through the first output shaft 116.

[0089] In some embodiments of the present application, the parallel driving mode further includes a first-gear parallel driving mode, a second-gear parallel driving mode, and a third-gear parallel driving mode.

[0090] In the first-gear parallel driving mode, the locking piece 107 is in the separated position, the planetary carrier 103, the ring gear 104, and the sun gear 106 can rotate relative to each other, the first fixed piece 108 is in the disconnected position, the first sun gear can rotate relative to the housing, and the second fixed piece 117 is in the connected position, and the second sun gear is fixed relative to the housing.

[0091] In the second-gear parallel driving mode, the locking piece 107 is in the locked position, the first fixed piece 108 is in the disconnected position, and the second fixed piece 117 is in the disconnected position. The planetary carrier 103, the ring gear 104, and the sun gear 106 rotate synchronously relative to the housing under the driving of the transmission input shaft 101 and the motor output shaft 102.

[0092] In the third-gear parallel driving mode, the locking piece 107 is in the separated position, the planetary carrier 103, the ring gear 104, and the sun gear 106 can rotate relative to each other, the first fixed piece 108 is in the connected position, the first sun gear is fixed relative to the housing, and the second fixed piece 117 is in the disconnected position, and the second sun gear can rotate relative to the housing.

[0093] Table 1

[0094]

[0095] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; 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 replacements 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 description of the present application. In particular, 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 with the housing; a motor output shaft rotatably connected with the housing; two epicyclic gear trains, the planet carrier and the ring gear of each of the epicyclic gear trains being rotatably connected with the housing, the planet carrier being in transmission connection with the transmission input shaft and the motor output shaft, the axes of the planet gears of the two epicyclic gear trains being fixed relative to each other, the two ring gears being coaxially fixed, the ring gears being configured to be in transmission connection with an axle, the sun gears of the two epicyclic gear trains having different gear ratios with the corresponding ring gears, the sun gears being separably fixed with the housing.

2. The vehicle transmission of claim 1, wherein, One of the planet carrier, the sun gear and the ring gear is movably provided with a locking member, the locking member having a locking position and a separation position, in the locking position, the locking member is connected with the other one of the planet carrier, the sun gear and the ring gear to fix the planet carrier, the sun gear and the ring gear, in the separation position, the other one of the planet carrier, the sun gear and the ring gear is separated from the locking member.

3. The vehicle transmission of claim 1, wherein, The planet carrier comprises a mounting shaft; The number of the planet gears of the two epicyclic gear trains is the same, the planet gears of one of the epicyclic gear trains are one-to-one correspondingly arranged with the planet gears of the other epicyclic gear train, the corresponding two planet gears are sleeved on the same mounting shaft.

4. The vehicle transmission of claim 1, wherein, Further comprising a fixing member movably arranged on the housing, the fixing member having a connection position and a disconnection position, in the connection position, the fixing member is connected with the sun gear to fixedly connect the sun gear with the housing, in the disconnection position, the fixing member is separated from the sun gear to disconnect the fixed connection between the sun gear and the housing.

5. The vehicle transmission of claim 4, wherein, Along the axial direction of the epicyclic gear trains, the two epicyclic gear trains are located on the same side where the fixing member is arranged; The transmission input shaft is coaxial with the epicyclic gear trains, a first end of the transmission input shaft is located on the side of the two epicyclic gear trains close to the fixing member, the first end of the transmission input shaft is rotatably connected with the housing, a second end of the transmission input shaft extends to the other side of the two epicyclic gear trains through the two sun gears, the second end of the transmission input shaft is fixedly connected with the planet carrier.

6. The vehicle transmission of claim 5, wherein, Further comprising a connecting member and a second connecting shaft; The connecting member is arranged on the side of the two epicyclic gear trains away from the fixing member, one end of the connecting member is fixedly connected with the ring gear, the other end of the connecting member extends to the central axis of the epicyclic gear trains; The second connecting shaft is coaxial with the epicyclic gear trains, one end of the second connecting shaft is connected with the other end of the connecting member, the other end of the second connecting shaft extends away from the epicyclic gear trains and is rotatably connected with the housing.

7. The vehicle transmission of claim 1, wherein, One of the transmission input shaft and the motor output shaft is coaxially fixed with the planet carrier, the vehicle transmission further comprises a first gear and a second gear, the first gear is in transmission connection with the second gear, the first gear is coaxially fixed with the transmission input shaft, the second gear is coaxially fixed with the motor output shaft.

8. The vehicle transmission of any one of claims 1-7, wherein, The axial direction of the epicyclic gear trains is parallel to the horizontal direction.

9. A power system characterized by, comprising: an engine; a first axle; a vehicle transmission according to any one of claims 1 to 8, the ring gear being drivingly connected to the first axle, the transmission input shaft having at least a connected state in which the transmission input shaft is drivingly connected to an output shaft of the engine.

10. A vehicle characterized by comprising: a powertrain comprising the powertrain of claim 9.

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