Transmission transmission system and vehicle

Abstract

The utility model provides a transmission transmission system and a vehicle, and relates to the technical field of new energy vehicles. The transmission transmission system comprises a power assembly, a first transmission assembly, a first transmission shaft, a first gear, a first gear sleeve, a first gear set, a planetary gear train, a second gear sleeve and an output assembly. The input end of the first transmission assembly and the first gear are in driving connection with the output end of the power assembly, the first gear is rotationally arranged on the first transmission shaft, and the first gear sleeve is in driving connection with the first transmission shaft and is in driving connection with the first gear or the output end of the first transmission assembly. The input end of the first gear set is in driving connection with the first transmission shaft, the output end is in driving connection with the input end of the output assembly or the input end of the planetary gear train through the second gear sleeve, the output end of the planetary gear train is in driving connection with the input end of the output assembly, and an output shaft of the output assembly is connected with a driving wheel. The transmission transmission system is sufficient in dynamic property, high in efficiency, high in gear shifting comfort, good in whole vehicle matching performance and high in reliability.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and more specifically, to a transmission drive system and a vehicle. Background Art

[0002] The principle and structural design of the transmission drive system is one of the core technologies of transmission research and development. A reasonably designed transmission drive system is of great significance for improving shifting quality, optimizing transmission assembly and manufacturing processes, and improving the vehicle's power, economy, safety and comfort throughout its life cycle.

[0003] In recent years, the development of multi-speed transmissions and powertrains for electric drive axles of heavy-duty trucks for pure electric use in new energy vehicles has just started. There are few multi-speed transmissions and transmission system products on the market that can be applied to heavy-duty trucks, and there are problems such as insufficient power, low transmission system efficiency, poor gear shifting comfort, poor vehicle matching, and insufficient reliability. Utility Model Content

[0004] The purpose of the present application is to provide a transmission drive system and a vehicle, which can be applied to the driving of heavy trucks, and has sufficient power, high efficiency, high gear shifting comfort, good vehicle matching and high reliability, in order to address the deficiencies in the above-mentioned prior art.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] On the one hand, an embodiment of the present application provides a transmission system, including: a power assembly, a first transmission assembly, a first transmission shaft, a first gear, a first gear sleeve, a first gear set, a planetary gear train, a second gear sleeve and an output assembly; the input end of the first transmission assembly and the first gear are respectively drivingly connected to the output end of the power assembly, the first gear is rotatably arranged on the first transmission shaft, the first gear sleeve is drivingly connected to the first transmission shaft and is drivingly connected to the first gear or the output end of the first transmission assembly, the input end of the first gear set is drivingly connected to the first transmission shaft, and the output end is drivingly connected to the input end of the output assembly or the input end of the planetary gear train through the second gear sleeve, the output end of the planetary gear train is drivingly connected to the input end of the output assembly, and the two output shafts of the output assembly are respectively used for driving connection with the two active wheels of the vehicle.

[0007] Optionally, the power assembly includes a motor, a second transmission shaft and a second gear, the second transmission shaft is drivingly connected to the motor, the second gear is fixedly disposed on the second transmission shaft, the second gear is drivingly connected to the input end of the first transmission assembly, and meshes with the first gear.

[0008] Optionally, the first transmission assembly includes a third transmission shaft, a third gear and a second gear set, the third gear and the input gear of the second gear set are respectively fixed on the third transmission shaft, the third gear is meshed with the second gear, and the first gear sleeve is meshed with the output gear or the first gear of the second gear set.

[0009] Optionally, the second gear set also includes a fourth gear and a fifth gear rotatably set on the second transmission shaft, the fourth gear is meshed with the input gear and rotates synchronously with the fifth gear, the fifth gear is meshed with the output gear, and the output gear is rotatably set on the first transmission shaft.

[0010] Optionally, the output component includes a differential assembly, the two output shafts of the differential assembly are respectively used to drive and connect with the two active wheels, the output end of the first gear set is drive and connected with the differential assembly through the second gear sleeve, and the output end of the planetary gear system is fixedly connected to the housing of the differential assembly.

[0011] Optionally, the planetary gear train includes a sun gear, planetary gears, a planetary carrier and a ring gear, the ring gear is fixedly connected to the transmission housing, the planetary carrier is fixedly connected to the housing of the differential assembly, the sun gear is rotatably set on the output shaft, the planetary gears are respectively meshed with the sun gear and the ring gear, and the second gear sleeve is drivingly connected to the sun gear or the housing of the differential assembly.

[0012] Optionally, the first gear set includes a sixth gear and a seventh gear meshing with the sixth gear, the sixth gear is fixedly arranged on the first transmission shaft, the seventh gear is rotatably arranged on the output shaft, and the seventh gear is drivingly connected to the second gear sleeve.

[0013] Optionally, the first transmission shaft, the second transmission shaft, the third transmission shaft and the output shaft of the output assembly are arranged in parallel along a preset direction.

[0014] Optionally, the fourth gear and the fifth gear are double gears.

[0015] Another aspect of an embodiment of the present application provides a vehicle, comprising a vehicle body, two driving wheels arranged on the vehicle body and a transmission drive system as described above, wherein the two driving wheels are respectively drivingly connected to two output ends of a differential output assembly of the transmission drive system.

[0016] The beneficial effects of this application include:

[0017] The present application provides a transmission system, including: a power assembly, a first transmission assembly, a first transmission shaft, a first gear, a first gear sleeve, a first gear set, a planetary gear train, a second gear sleeve and an output assembly; the input end of the first transmission assembly and the first gear are respectively connected to the output end of the power assembly, the first gear is rotatably arranged on the first transmission shaft, the first gear sleeve is connected to the first transmission shaft and connected to the first gear or the output end of the first transmission assembly, the input end of the first gear set is connected to the first transmission shaft, the output end is connected to the input end of the output assembly or the input end of the planetary gear train through the second gear sleeve, the output end of the planetary gear train is connected to the input end of the output assembly, and the two output shafts of the output assembly are respectively used to connect to the two driving wheels of the vehicle. The transmission system of the transmission is designed with four gears, combined with the requirements of low-speed high-torque load, high-speed and efficient drive, and has the characteristics of strong power, high transmission system efficiency, high gear shifting comfort, good vehicle matching, reliable use, small space occupation, etc., and can be applied to the drive of heavy trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of the transmission system provided in the embodiment of the present application;

[0020] Figure 2 The transmission route of the transmission system provided in the embodiment of the present application when it is in the first gear working mode;

[0021] Figure 3 The transmission route of the transmission system provided in the embodiment of the present application when it is in the second gear working mode;

[0022] Figure 4 The transmission route of the transmission system provided in the embodiment of the present application when it is in the third gear working mode;

[0023] Figure 5 The transmission route of the transmission system provided in the embodiment of the present application when it is in the fourth gear working mode;

[0024] Figure 6 The second structural schematic diagram of the transmission system provided by the embodiment of the present application;

[0025] Figure 7 This is the third structural schematic diagram of the transmission transmission system provided in the embodiment of the present application.

[0026] Icons: 10-transmission transmission system; 11-power assembly; 111-motor; 112-second transmission shaft; 113-second gear; 12-first transmission assembly; 121-third transmission shaft; 122-third gear; 123-input gear; 124-output gear; 125-fourth gear; 126-fifth gear; 127-fourth transmission shaft; 13-first transmission shaft; 14-first gear; 15-first gear sleeve; 16-first gear set; 161-sixth gear; 162-seventh gear; 17-planetary gear train; 171-sun gear; 172-planetary gear; 173-planet carrier; 174-ring gear; 18-second gear sleeve; 19-output assembly; 191-differential assembly; 192-output shaft; 20-driving wheel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In one aspect of the embodiment of the present application, please refer to Figure 1 , a transmission transmission system 10 is provided, including: a power component 11, a first transmission component 12, a first transmission shaft 13, a first gear 14, a first gear sleeve 15, a first gear set 16, a planetary gear train 17, a second gear sleeve 18 and an output component 19.

[0033] Among them, the input end of the first transmission component 12 and the first gear 14 are respectively driven and connected to the output end of the power component 11, the first gear 14 is rotatably set on the first transmission shaft 13, the first gear sleeve 15 is driven and connected to the first transmission shaft 13 and is driven and connected to the first gear 14 or the output end of the first transmission component 12, the input end of the first gear set 16 is driven and connected to the first transmission shaft 13, and the output end is driven and connected to the input end of the output component 19 or the input end of the planetary gear train 17 through the second gear sleeve 18, the output end of the planetary gear train 17 is driven and connected to the input end of the output component 19, and the two output shafts 192 of the output component 19 are respectively used to be driven and connected to the two driving wheels 20 of the vehicle.

[0034] For example, the first gear 14 is rotatably disposed on the first transmission shaft 13 via a needle bearing, and the first gear sleeve 15 is connected to the first transmission shaft 13 via a coupling tooth.

[0035] The transmission system 10 is connected to the output of the first gear 14 or the first transmission assembly 12 through the first gear sleeve 15, and the second gear sleeve 18 is connected to the input of the output assembly 19 or the input of the planetary gear train 17, thereby having a four-speed working mode.

[0036] Please refer to Figure 2When the transmission system 10 is in the first gear working mode, the first gear sleeve 15 is drivingly connected to the output end of the first transmission assembly 12, and the second gear sleeve 18 is drivingly connected to the output end of the first gear set 16 and the input end of the planetary gear train 17. The transmission route of the first gear working mode is as follows: the output end of the power assembly 11 transmits power to the input end of the first transmission assembly 12, the output end of the first transmission assembly 12 drives the first transmission shaft 13 to rotate through the first gear sleeve 15, and the first transmission shaft 13 then transmits power to the input end of the first gear set 16, the output end of the first gear set 16 transmits power to the input end of the planetary gear train 17 through the second gear sleeve 18, and the output end of the planetary gear train 17 transmits power to the input end of the output assembly 19, so that the two output shafts 192 of the output assembly 19 respectively drive the two driving wheels 20 of the vehicle to rotate. The transmission line of the first gear working mode connects the planetary gear train 17 and the output shaft 192 of the output assembly 19 in series, with a large speed ratio and strong power. The motor 111 required for the same power output is relatively small, and the passenger car motor platform can be borrowed, which is easy to match, low cost and high efficiency. In addition, the transmission line of the first gear working mode has a compact structure, high vehicle space matching, and is compatible with multiple heavy truck model application scenarios.

[0037] Please refer to Figure 3 When the transmission system 10 is in the second gear working mode, the first gear sleeve 15 is drivingly connected to the first gear 14, and the second gear sleeve 18 is drivingly connected to the output end of the first gear set 16 and the input end of the planetary gear train 17. The transmission route of the second gear working mode is as follows: the output end of the power assembly 11 transmits power to the first gear 14, the first gear 14 drives the first transmission shaft 13 to rotate through the first gear sleeve 15, and the first transmission shaft 13 then transmits power to the input end of the first gear set 16, the output end of the first gear set 16 transmits power to the input end of the planetary gear train 17 through the second gear sleeve 18, and the output end of the planetary gear train 17 transmits power to the input end of the output assembly 19, so that the two output shafts 192 of the output assembly 19 respectively drive the two driving wheels 20 of the vehicle to rotate. The transmission route of the second gear working mode connects the planetary gear train 17 and the output shaft 192 of the output assembly 19 in series, with fewer transmission paths, high efficiency, large speed ratio, strong power, compact structure, and high space matching of the whole vehicle.

[0038] Please refer to Figure 4When the transmission system 10 is in the third gear working mode, the first gear sleeve 15 is drivingly connected to the output end of the first transmission component 12, and the second gear sleeve 18 is drivingly connected to the output end of the first gear set 16 and the input end of the output component 19. The transmission route of the third gear working mode is as follows: the output end of the power component 11 transmits power to the input end of the first transmission component 12, the output end of the first transmission component 12 drives the first transmission shaft 13 to rotate through the first gear sleeve 15, and the first transmission shaft 13 then transmits power to the input end of the first gear set 16, and the output end of the first gear set 16 transmits power to the input end of the output component 19 through the second gear sleeve 18, so that the two output shafts 192 of the output component 19 respectively drive the two driving wheels 20 of the vehicle to rotate. The third gear working mode has a compact structure, strong power, and high space matching of the whole vehicle.

[0039] Please refer to Figure 5 When the transmission system 10 is in the fourth gear working mode, the first gear sleeve 15 is drivingly connected to the first gear 14, and the second gear sleeve 18 is drivingly connected to the output end of the first gear set 16 and the input end of the output assembly 19. The transmission route of the fourth gear working mode is as follows: the output end of the power assembly 11 transmits power to the first gear 14, the first gear 14 drives the first transmission shaft 13 to rotate through the first gear sleeve 15, and the first transmission shaft 13 then transmits power to the input end of the first gear set 16, and the output end of the first gear set 16 transmits power to the input end of the output assembly 19 through the second gear sleeve 18, so that the two output shafts 192 of the output assembly 19 respectively drive the two driving wheels 20 of the vehicle to rotate. The fourth gear working mode has fewer transmission paths, high efficiency, compact structure, and high space matching of the whole vehicle.

[0040] In addition, the first transmission assembly 12 is not only a transmission structure in the first gear working mode and the third gear working mode, but also a power output structure, with a simple structural design and small space occupation.

[0041] In summary, the above-mentioned transmission transmission system 10 is designed with four gears, combining the requirements of low-speed high-torque load and high-speed and efficient driving. It has the characteristics of strong power, high transmission system efficiency, high gear shifting comfort, good vehicle matching, reliable use, small space occupancy, etc., and can be applied to the drive of heavy trucks.

[0042] Optionally, see Figure 1 The power assembly 11 includes a motor 111, a second transmission shaft 112 and a second gear 113. The second transmission shaft 112 is drivingly connected to the motor 111. The second gear 113 is fixedly arranged on the second transmission shaft 112. The second gear 113 is drivingly connected to the input end of the first transmission assembly 12 and meshes with the first gear 14.

[0043] The second transmission shaft 112 may be a motor output shaft, or a transmission shaft coaxial with and fixedly connected to the motor output shaft. The second gear 113 is sleeved on the second transmission shaft 112 and coaxially arranged with the second transmission shaft 112. The motor 111 drives the second transmission shaft 112 to rotate around its axis, thereby driving the second gear 113 thereon to rotate. The second gear 113 is the output end of the power assembly 11. The second gear 113 is meshed with the input end of the first transmission assembly 12 and the first gear 14 at the same time, thereby transmitting the power output by the motor 111 to the first transmission assembly 12 and the first gear 14.

[0044] The structure of the motor 111 and the second gear 113 is used as a power source to drive the active wheel 20 to rotate, which can simplify the structure of the transmission system 10, improve the transmission efficiency, save space and reduce costs. In addition, the second gear 113 is meshed with the input end of the first transmission component 12 and the first gear 14 at the same time, and then cooperates with the first gear sleeve 15 to selectively connect with the first gear 14 and the output end of the first transmission component 12, and the second gear sleeve 18 is selectively connected with the input end of the output component 19 and the input end of the planetary gear system 17, so that the transmission system 10 can achieve the output of the four-speed working mode under the drive of a group of power components 11, further reducing the cost.

[0045] For example, the second gear 113 is fixedly connected to the second transmission shaft 112 via a spline.

[0046] Optionally, the first transmission assembly 12 includes a third transmission shaft 121, a third gear 122 and a second gear set, the third gear 122 and the input gear 123 of the second gear set are respectively fixed on the third transmission shaft 121, the third gear 122 is meshed with the second gear 113, and the first gear sleeve 15 is meshed with the output gear 124 of the second gear set or the first gear 14.

[0047] The third gear 122 is the input end of the first transmission assembly 12, and the third gear 122 is meshed with the second gear 113, so that the power output by the motor 111 can be transmitted to the first transmission assembly 12 through the second gear 113. The third gear 122, the second gear 113 and the first gear 14 form a set of triple gear transmission, which has a simple structure and occupies a small space.

[0048] The input gear 123 of the second gear set is fixed on the third transmission shaft 121, and other gears are adaptively mounted on other transmission shafts, which is not limited in this embodiment. It can be understood that the third gear 122 and the input gear 123 are respectively sleeved on the third transmission shaft 121 and are coaxially arranged with the third transmission shaft 121. The power output by the power assembly 11 is transmitted to the input gear 123 coaxially arranged with the third gear 122 through the second gear 113 and the third gear 122, which has a simple structure and occupies less space.

[0049] For example, the third gear 122 and the input gear 123 are fixedly connected to the third transmission shaft 121 via splines respectively.

[0050] Optionally, the second gear set further includes a fourth gear 125 and a fifth gear 126 , the fourth gear 125 meshes with the input gear 123 and rotates synchronously with the fifth gear 126 , the fifth gear 126 meshes with the output gear 124 , and the output gear 124 is rotatably disposed on the first transmission shaft 13 .

[0051] The first transmission shaft 13 and the third transmission shaft 121 are respectively arranged on both sides of the power assembly 11, so that the first gear 14 and the third gear 122 are respectively driven and connected with the second gear 113. When the power of the motor 111 is transmitted to the third transmission shaft 121, the power transmission gear is also required to transmit the power to the first transmission shaft 13, and the fourth gear 125 and the fifth gear 126 can just play the role of power transmission, so that the power output by the motor 111 is transmitted to the first transmission shaft 13 through the first transmission assembly 12.

[0052] For example, the output gear 124 is rotatably disposed on the first transmission shaft 13 via a needle bearing.

[0053] Optionally, the fourth gear 125 and the fifth gear 126 are double gears. Double gear transmission has a large speed ratio, a simple structure, and occupies little space.

[0054] Preferably, please refer to Figure 1 The fourth gear 125 and the fifth gear 126 are rotatably disposed on the second transmission shaft 112 .

[0055] The fourth gear 125 and the fifth gear 126 utilize the space between the first transmission shaft 13 and the third transmission shaft 121 to transmit power, and the structure is simple without increasing the occupied space of the transmission transmission system 10 .

[0056] For example, the fourth gear 125 and the fifth gear 126 are rotatably disposed on the second transmission shaft 112 via bearings.

[0057] In other embodiments, please refer to Figure 6 The transmission system 10 further includes a fourth transmission shaft 127 , which is parallel to the third transmission shaft 121 , and the fourth gear 125 and the fifth gear 126 are disposed on the fourth transmission shaft 127 .

[0058] In this arrangement, the power of the motor 111 can also be transmitted from the third transmission shaft 121 to the first transmission shaft 13, but an additional fourth transmission shaft 127 is required, which occupies a relatively large space and has a relatively high cost. Optionally, the first transmission shaft 13, the second transmission shaft 112, the third transmission shaft 121 and the output shaft 192 of the output assembly 19 are arranged in parallel along a preset direction. Parallel shaft transmission has high efficiency, simple structure, strong applicability, large torque and good stability.

[0059] Optionally, the output component 19 includes a differential assembly 191, and the two output shafts 192 of the differential assembly 191 are respectively used to drive and connect with the two driving wheels 20, the output end of the first gear set 16 is drive and connected with the differential assembly 191 through the second gear sleeve 18, and the output end of the planetary gear train 17 is fixedly connected to the housing of the differential assembly 191.

[0060] The two output shafts 192 of the differential assembly 191 are coaxially arranged and can be fixedly connected to the two driving wheels 20 of the vehicle through the half-shaft flanges. The differential assembly 191 is used to balance and adjust the rotation speed of the two driving wheels 20, so that the vehicle can maintain stability in driving conditions such as turning and crossing pits. The output end of the first gear set 16 is connected to the second gear sleeve 18 by driving, and is connected to the input end of the planetary gear system 17 or the housing of the differential assembly 191 by sliding of the second gear sleeve 18 to perform gear shifting and torque transmission.

[0061] Optionally, the first gear set 16 includes a sixth gear 161 and a seventh gear 162 meshing with the sixth gear 161 , the sixth gear 161 is fixedly disposed on the first transmission shaft 13 , the seventh gear 162 is rotatably disposed on the output shaft 192 , and the seventh gear 162 is drivingly connected to the second gear sleeve 18 .

[0062] The sixth gear 161 is the input end of the first gear set 16, and the seventh gear 162 is the output end of the first gear set 16. The sixth gear 161 is sleeved on the first transmission shaft 13 and is coaxially arranged with the first transmission shaft 13. The seventh gear 162 is sleeved on an output shaft 192 of the differential assembly 191 and is coaxially arranged with the output shaft 192. The sixth gear 161 and the seventh gear 162 cooperate to transmit the power at the first transmission shaft 13 to the second gear sleeve 18.

[0063] For example, the sixth gear 161 is fixedly connected to the first transmission shaft 13 via a spline, the seventh gear 162 is normally connected to the second gear sleeve 18 via a coupling tooth, and the second gear sleeve 18 is connected to the coupling tooth on the input end of the planetary gear train 17 or the coupling tooth on the housing of the differential assembly 191 via sliding.

[0064] In other embodiments, the first gear set 16 may also include only the sixth gear 161, which is fixedly disposed on the first transmission shaft 13 and directly drivingly connected to the second gear sleeve 18. In this case, the diameter of the sixth gear 161 is relatively large, which occupies a relatively large space, resulting in the power assembly 11 being disposed at a relatively far distance from the first transmission shaft 13.

[0065] Optionally, the planetary gear train 17 includes a sun gear 171, planetary gears 172, a planet carrier 173 and a ring gear 174, the ring gear 174 is fixedly connected to the transmission housing, the planet carrier 173 is fixedly connected to the housing of the differential assembly 191, the sun gear 171 is rotatably set on the output shaft 192, the planetary gears 172 are respectively meshed with the sun gear 171 and the ring gear 174, and the second gear sleeve 18 is drivingly connected to the sun gear 171 or the housing of the differential assembly 191.

[0066] The sun gear 171 is the input end of the planetary gear train 17, and the planet carrier 173 is the output end of the planetary gear train 17. Based on the parallel shaft transmission, the planetary gear train 17 is connected in series through the second gear sleeve 18, which has a simple structure, occupies a small space, and has the advantages of large transmission ratio and high efficiency.

[0067] Furthermore, the housing of the differential assembly 191 is connected to the planet carrier 173 , and the housing of the differential assembly 191 is drivingly connected to the second gear sleeve 18 through the planet carrier 173 .

[0068] For example, please refer to Figure 1 , the second gear sleeve 18 is located on the side of the seventh gear 162 away from the planet carrier 173. In this embodiment, the sun gear 171 and the planet carrier 173 need to be set longer to achieve driving connection with the second gear sleeve 18, but the diameter of the second gear sleeve 18 can be set smaller. Alternatively, please refer to Figure 7 , the second gear sleeve 18 is located between the seventh gear 162 and the planet carrier 173. In this embodiment, the sun gear 171 and the planet carrier 173 are set shorter to achieve the driving connection with the second gear sleeve 18, but the diameter of the second gear sleeve 18 needs to be set larger. Those skilled in the art can make reasonable choices according to actual conditions.

[0069] In one embodiment, the transmission drive system 10 is drivingly connected to the first gear 14 or the output gear 124 of the first transmission assembly 12 through the first gear sleeve 15, and the second gear sleeve 18 is drivingly connected to the housing of the differential assembly 191 or the sun gear 171 of the planetary gear train 17, thereby having a four-speed working mode.

[0070] Please refer to Figure 2When the transmission system 10 is in the first gear working mode, the first gear sleeve 15 is drivingly connected to the output gear 124, and the second gear sleeve 18 is drivingly connected to the seventh gear 162 and the sun gear 171. The transmission route of the first gear working mode is as follows: the motor 111 transmits power to the second gear 113 through the second transmission shaft 112, the second gear 113 is meshed with the third gear 122, and the power is transmitted to the third gear 122 through the second gear 113, and the third gear 122 drives the third transmission shaft 121 to rotate, thereby transmitting the power to the input gear 123, the fourth gear 125, the fifth gear 126 and the output gear 124 in sequence. The first gear sleeve 15 is coupled with the coupling teeth on the output gear 124, and the output gear 124 transmits power to the sixth gear 161 on the first transmission shaft 13 through the first gear sleeve 15. The sixth gear 161 meshes with the seventh gear 162, and the second gear sleeve 18 connects the seventh gear 162 and the sun gear 171. The sun gear 171 then transmits power to the differential assembly 191 through the planet carrier 173. The differential assembly 191 transmits power to the two driving wheels 20 through two output shafts 192, thereby driving the vehicle. The transmission route of the first gear working mode is a four-axis four-stage parallel shaft gear transmission plus a set of planetary gear transmission structure.

[0071] Please refer to Figure 3 When the transmission system 10 is in the second gear working mode, the first gear sleeve 15 is drivingly connected with the first gear 14, and the second gear sleeve 18 is drivingly connected with the seventh gear 162 and the sun gear 171. The transmission route of the second gear working mode is as follows: the motor 111 transmits power to the second gear 113 through the second transmission shaft 112, the second gear 113 is meshed with the first gear 14, and the power is transmitted to the first gear 14, the first gear sleeve 15 is engaged with the coupling teeth on the first gear 14, and the power is transmitted to the sixth gear 161 on the first transmission shaft 13. The sixth gear 161 is meshed with the seventh gear 162, the second gear sleeve 18 connects the seventh gear 162 and the sun gear 171, and the sun gear 171 then transmits power to the differential assembly 191 through the planet carrier 173, and the differential assembly 191 transmits power to the two driving wheels 20 through the two output shafts 192, thereby driving the vehicle. The transmission route of the second gear working mode is a three-axis two-stage parallel shaft gear transmission plus a set of planetary gear transmission structure.

[0072] Please refer to Figure 4When the transmission system 10 is in the third gear working mode, the first gear sleeve 15 is drivingly connected to the output gear 124, and the second gear sleeve 18 is drivingly connected to the seventh gear 162 and the housing of the differential assembly 191. The transmission route of the third gear working mode is as follows: the motor 111 transmits power to the second gear 113 through the second transmission shaft 112, the second gear 113 is meshed with the third gear 122, and the power is transmitted to the third gear 122 through the second gear 113, and the third gear 122 drives the third transmission shaft 121 to rotate, thereby transmitting the power to the input gear 123, the fourth gear 125, the fifth gear 126 and the output gear 124 in sequence. The first gear sleeve 15 is coupled with the coupling teeth on the output gear 124, and the output gear 124 transmits power to the sixth gear 161 on the first transmission shaft 13 through the first gear sleeve 15. The sixth gear 161 is meshed with the seventh gear 162, and the second gear sleeve 18 drives and connects the seventh gear 162 with the housing of the differential assembly 191, directly transmitting power to the differential assembly 191, and the differential assembly 191 transmits power to the two driving wheels 20 through two output shafts 192, thereby driving the vehicle.

[0073] Please refer to Figure 5 When the transmission system 10 is in the fourth gear working mode, the first gear sleeve 15 is drivingly connected to the first gear 14, and the second gear sleeve 18 is drivingly connected to the seventh gear 162 and the housing of the differential assembly 191. The transmission route of the fourth gear working mode is as follows: the motor 111 transmits power to the second gear 113 through the second transmission shaft 112, the second gear 113 is meshed with the first gear 14, and the power is transmitted to the first gear 14, and the first gear sleeve 15 is combined with the coupling teeth on the first gear 14, and the power is transmitted to the sixth gear 161 on the first transmission shaft 13. The sixth gear 161 is meshed with the seventh gear 162, and the second gear sleeve 18 is drivingly connected to the housing of the differential assembly 191, and the power is directly transmitted to the differential assembly 191, and the differential assembly 191 transmits the power to the two driving wheels 20 through the two output shafts 192, thereby driving the vehicle. The transmission route of the fourth gear working mode is a three-axis two-stage parallel shaft gear transmission structure.

[0074] This embodiment also provides a vehicle, including a vehicle body, two driving wheels 20 arranged on the vehicle body and a transmission drive system 10 as described above, and the two driving wheels 20 are respectively driven and connected to two output ends of the differential output component 19 of the transmission drive system 10.

[0075] The vehicle includes the same structure and benefits as the transmission system 10 in the previous embodiment. The structure and benefits of the transmission system 10 have been described in detail in the previous embodiment and will not be repeated here.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission system, characterized in that: include: A power assembly, a first transmission assembly, a first transmission shaft, a first gear, a first gear sleeve, a first gear set, a planetary gear train, a second gear sleeve and an output assembly; The input end of the first transmission assembly and the first gear are drivingly connected to the output end of the power assembly respectively, the first gear is rotatably set on the first transmission shaft, the first gear sleeve is drivingly connected to the first transmission shaft and is drivingly connected to the first gear or the output end of the first transmission assembly, the input end of the first gear set is drivingly connected to the first transmission shaft, and the output end is drivingly connected to the input end of the output assembly or the input end of the planetary gear system through the second gear sleeve, the output end of the planetary gear system is drivingly connected to the input end of the output assembly, and the two output shafts of the output assembly are respectively used for driving connection with the two active wheels of the vehicle.

2. The transmission system according to claim 1, characterized in that: The power assembly includes a motor, a second transmission shaft and a second gear, the second transmission shaft is drivingly connected to the motor, the second gear is fixedly arranged on the second transmission shaft, the second gear is drivingly connected to the input end of the first transmission assembly and meshes with the first gear.

3. The transmission system according to claim 2, characterized in that: The first transmission assembly includes a third transmission shaft, a third gear and a second gear set. The third gear and the input gear of the second gear set are respectively fixed on the third transmission shaft. The third gear is meshed with the second gear. The first gear sleeve is meshed with the output gear of the second gear set or the first gear.

4. The transmission system according to claim 3, characterized in that: The second gear set also includes a fourth gear and a fifth gear rotatably set on the second transmission shaft, the fourth gear is meshed with the input gear and rotates synchronously with the fifth gear, the fifth gear is meshed with the output gear, and the output gear is rotatably set on the first transmission shaft.

5. The transmission system according to claim 1, characterized in that: The output component includes a differential assembly, the two output shafts of the differential assembly are respectively used to drive and connect with the two active wheels, the output end of the first gear set is drive and connected with the differential assembly through the second gear sleeve, and the output end of the planetary gear system is fixedly connected with the housing of the differential assembly.

6. The transmission system according to claim 5, characterized in that: The planetary gear train includes a sun gear, planetary gears, a planetary carrier and a ring gear. The ring gear is fixedly connected to the transmission housing, the planetary carrier is fixedly connected to the housing of the differential assembly, the sun gear is rotatably arranged on the output shaft, the planetary gears are respectively meshed with the sun gear and the ring gear, and the second gear sleeve is drivingly connected to the sun gear or the housing of the differential assembly.

7. The transmission system according to claim 5, characterized in that: The first gear set includes a sixth gear and a seventh gear meshing with the sixth gear, the sixth gear is fixedly arranged on the first transmission shaft, the seventh gear is rotatably arranged on the output shaft, and the seventh gear is drivingly connected to the second gear sleeve.

8. The transmission system according to claim 3, characterized in that: The first transmission shaft, the second transmission shaft, the third transmission shaft and the output shaft of the output assembly are arranged in parallel along a preset direction.

9. The transmission system according to claim 4, characterized in that: The fourth gear and the fifth gear are double gears.

10. A vehicle, characterized in that: It comprises a vehicle body, two driving wheels arranged on the vehicle body and a transmission transmission system as claimed in any one of claims 1 to 9, wherein the two driving wheels are drivingly connected to two output ends of a differential output component of the transmission transmission system respectively.

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