Special hybrid transmission, hybrid driving system and vehicle

Abstract

The utility model discloses a special hybrid transmission, a hybrid driving system and a vehicle, the special hybrid transmission comprises a power input shaft, a power output shaft, a wet-type double clutch and a planetary gear mechanism, the wet-type double clutch comprises a first clutch and a second clutch, and the planetary gear mechanism comprises a planet carrier, a sun gear and a gear ring. The output end of an engine is connected with the power input shaft, the power input shaft is connected with the sun gear through the first clutch, the second clutch is connected with the first clutch through an intermediate shaft, the intermediate shaft is further connected with the planet carrier through the second clutch, and the planet carrier is connected with the output end of the engine. The gear ring is respectively meshed with a planet wheel on the planet carrier and a motor gear of the motor, and the power output shaft is connected with the planet carrier or the gear ring. The speed ratio can be steplessly and stably adjusted, the gear shifting efficiency is improved, gear shifting is stable and smooth, and gear shifting power loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a hybrid-specific transmission, a hybrid drive system and a vehicle. Background Art

[0002] Existing dedicated hybrid transmissions, also known as DHT (Dedicated Hybrid Transmission) transmissions, require additional components to increase gear shifting positions, resulting in a complex transmission structure, many redundant components, low shifting efficiency, shifting jams, and possible shifting power loss. Utility Model Content

[0003] The utility model aims to provide a hybrid-specific transmission, a hybrid drive system and a vehicle, so as to solve the technical problems in the prior art that in order to increase the gear shifting positions, additional components need to be added, resulting in a complex transmission structure, many redundant components, low gear shifting efficiency, gear shifting jams, and possible gear shifting power loss.

[0004] In order to solve the above technical problems, the utility model provides a hybrid-specific transmission, including a power input shaft, a power output shaft, a wet dual clutch, and a planetary gear mechanism, wherein the wet dual clutch includes a first clutch and a second clutch, and the planetary gear mechanism includes a planet carrier, a sun gear and a ring gear, the output end of the engine is connected to the power input shaft, and the power input shaft is connected to the sun gear through the first clutch so that the power input shaft is engaged with or disengaged from the sun gear, the second clutch is connected to the first clutch through an intermediate shaft, and the intermediate shaft is also connected to the planet carrier through the second clutch so that the intermediate shaft is engaged with or disengaged from the planet carrier, the ring gear is respectively meshed with the planetary gears on the planet carrier and the motor gears of the motor, and the power output shaft is connected to the planet carrier or the ring gear.

[0005] In some embodiments, the driven part of the first clutch is connected to the power input shaft, the first active part of the first clutch is connected to the sun gear through the first output shaft, and the second active part of the first clutch is connected to the intermediate shaft through the second output shaft;

[0006] The driven part of the second clutch is connected to the intermediate shaft, and the active part of the second clutch is connected to the planet carrier through the third output shaft.

[0007] In some embodiments, the ring gear is a double-sided ring gear, which is arranged on the radially outer side of the planetary carrier, the inner ring gear of the double-sided ring gear is meshed with the planetary gear, the outer ring gear of the double-sided ring gear is meshed with the motor gear, and the inner ring gear of the double-sided ring gear is connected to the power output shaft through a first transmission gear or a first transmission gear set.

[0008] In some embodiments, a planetary carrier output shaft is provided on the planetary carrier, and the planetary carrier output shaft is connected to the power output shaft through a second transmission gear set, the second transmission gear set includes a second transmission gear and a third transmission gear that are meshed with each other, the second transmission gear is installed on the planetary carrier output shaft, the third transmission gear is installed on the power output shaft, and the third transmission gear is meshed with the inner gear ring of the double-sided gear ring.

[0009] The utility model also provides a hybrid drive system, comprising an engine and a motor, and also comprising a hybrid-specific transmission as described in any of the above technical solutions.

[0010] In some embodiments, the hybrid drive system further includes a driving oil pump, wherein the driving oil pump is connected to a filter in the oil pan via a liquid inlet pipeline, and the driving oil pump is connected to an oil circuit of the planetary gear mechanism via a liquid outlet pipeline.

[0011] In some embodiments, the wet dual clutch also includes a first hydraulic drive device connected to the first clutch and a second hydraulic drive device connected to the second clutch, the first hydraulic drive device includes a first hydraulic pump, the second hydraulic drive device includes a second hydraulic pump, and the first outlet pipeline of the first hydraulic pump and the second outlet pipeline of the second hydraulic pump are respectively connected to the liquid outlet pipeline.

[0012] In some embodiments, the first hydraulic drive device also includes a first solenoid valve electrically connected or signal connected to the first hydraulic pump, and the second hydraulic drive device also includes a second solenoid valve electrically connected or signal connected to the second hydraulic pump, and the first solenoid valve and the second solenoid valve are also electrically connected or signal connected to the driving oil pump, respectively.

[0013] In some embodiments, the driving oil pump is connected to the planetary carrier or the ring gear through a transmission mechanism.

[0014] The utility model also provides a vehicle, comprising the hybrid drive system described in any one of the above technical solutions.

[0015] The hybrid transmission, hybrid drive system and vehicle provided by the embodiment of the utility model are provided with a power input shaft, a power output shaft, a wet dual clutch and a planetary gear mechanism. The wet dual clutch includes a first clutch and a second clutch. The planetary gear mechanism includes a planet carrier, a sun gear and a ring gear to connect the power input shaft. The power input shaft is connected to the sun gear through the first clutch, the second clutch is connected to the first clutch through an intermediate shaft, and the intermediate shaft is also connected to the planet carrier through the second clutch. The ring gear is respectively meshed with the planetary gears on the planet carrier and the electric motor gears. The power output shaft is connected to the planet carrier or the ring gear. The driving mode of the vehicle can be switched by the mutual cooperation of the first clutch and the second clutch arranged coaxially at intervals, and the first clutch is used in the hybrid mode. The first clutch and the second clutch are independently controlled to provide more vehicle speed gears to meet the different speed regulation requirements of users and further improve the user's shifting experience. In addition, the transmission only needs to arrange different clutches along its axial direction and connect them axially with different components of the planetary gear mechanism. The overall structure of the transmission is simple and reasonable, and fewer components are required for shifting, which further improves the shifting efficiency and can reduce the volume and weight of the transmission, thereby achieving lightweight transmission and reducing the manufacturing cost of the transmission. In addition, the wet dual clutch used in this embodiment has higher shifting efficiency and shifting response speed, and the first clutch and the second clutch are respectively located in oil tanks full of lubricating oil instead of idling, so that the clutch can engage and disengage more smoothly, thereby improving the smoothness and comfort of shifting; in addition, the clutch is always cooled and protected by lubricating oil, and can withstand higher temperatures and more frequent shifting, thereby improving the durability of the entire transmission system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of a hybrid transmission according to an embodiment of the utility model;

[0018] Figure 2A schematic diagram of power transmission in the first gear of a hybrid transmission according to an embodiment of the present utility model;

[0019] Figure 3 A schematic diagram of power transmission in the second gear of a hybrid transmission according to an embodiment of the present utility model;

[0020] Figure 4 It is a schematic diagram of power transmission of the third gear of the hybrid transmission according to an embodiment of the utility model;

[0021] Figure 5 It is a schematic structural diagram of a hybrid drive system according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 1-power input shaft; 2-power output shaft; 31-first clutch, 311-first output shaft, 312-second output shaft, 32-second clutch, 321-third output shaft, 33-first hydraulic pump, 34-second hydraulic pump, 35-first solenoid valve, 36-second solenoid valve; 41-planet carrier, 411-planet carrier output shaft, 42-sun gear, 43-gear ring, 431-inner gear ring, 432-outer gear ring, 44-planetary gear; 5-intermediate shaft; 61-first transmission gear, 62-second transmission gear, 63-third transmission gear; 20-engine; 30-motor, 301-motor gear, 302-motor output shaft; 40-driving oil pump, 401-liquid inlet pipeline, 402-liquid outlet pipeline; 50-oil pan, 501-filter. DETAILED DESCRIPTION

[0024] Various aspects and features of the present invention are described herein with reference to the accompanying drawings.

[0025] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of the embodiments. Other modifications within the scope and spirit of the present utility model will occur to those skilled in the art.

[0026] The accompanying drawings, which are included in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, are used to explain the principles of the present invention.

[0027] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0028] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present invention that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0029] The above and other aspects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0030] Specific embodiments of the present invention are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present invention, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present invention. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of ways with substantially any suitable detailed structure.

[0031] This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", all of which may refer to one or more of the same or different embodiments according to the present invention.

[0032] Figures 1 to 4 The structure diagram of the hybrid transmission provided by the embodiment of the utility model is shown. Figures 1 to 4 As shown, the first embodiment of the utility model provides a hybrid transmission, including a power input shaft 1, a power output shaft 2, a wet double clutch, and a planetary gear mechanism, wherein the wet double clutch includes a first clutch 31 and a second clutch 32, and the planetary gear mechanism includes a planet carrier 41, a sun gear 42 and a ring gear 43.

[0033] The output end of the engine 20 is connected to the power input shaft 1, the power input shaft 1 is connected to the sun gear 42 through the first clutch 31, the second clutch 32 is connected to the first clutch 31 through the intermediate shaft 5, the intermediate shaft 5 is also connected to the planetary carrier 41 through the second clutch 32, the ring gear 43 is respectively engaged with the planetary gear 44 on the planetary carrier 41 and the motor gear 301 of the motor 30, and the power output shaft 2 is connected to the planetary carrier 41 or the ring gear 43.

[0034] Specifically, the planet carrier 41, the sun gear 42 and the ring gear 43 are arranged concentrically, the planet gear 44 is mounted on the planet carrier 41, the planet carrier 41 provides support for the planet gear 44, the planet gear 44 is arranged around the sun gear 42, and the planet gear 44 is located between the sun gear 42 and the ring gear 43, and the planet gear 44 is respectively meshed with the sun gear 42 and the ring gear 43; the motor gear 301 is hung on the motor output shaft 302 of the motor 30 and meshed with the ring gear 43.

[0035] The output shaft of the engine 20 is connected to one end of the power input shaft 1, and the first clutch 31 is connected to the power input shaft 1, and the first clutch 31 can be connected to the sun gear 42 through the connecting shaft. The first clutch 31 is used to connect or disconnect the power transmission between the engine 20 and the sun gear 42.

[0036] The intermediate shaft 5 is connected between the first clutch 31 and the second clutch 32, and the output end of the intermediate shaft 5 is connected to one axial end of the planetary carrier 41 through the second clutch 32, and the axial end is the power input end of the planetary carrier 41. The second clutch 32 is used to connect or disconnect the power transmission between the engine 20 and the planetary carrier 41.

[0037] The connecting shaft of the first clutch 31 extends from one axial end into the planet carrier 41 and connects to the sun gear 42 to input power; the other axial end of the planet carrier 41 is the power output end, which is connected to the power output shaft 2 for outputting power.

[0038] like Figure 2 As shown, when the first clutch 31 is engaged and the second clutch 32 is disengaged, the power output by the engine 20 is transmitted to the power input shaft 1 through the first clutch 31, and then transmitted to the sun gear 42 connected to the power input shaft 1 to rotate the sun gear 42, and the sun gear 42 rotates to transmit the power to the planetary carrier 41 through the planetary gear 44, and then the engine power is output to the driving wheels of the vehicle through the power output shaft 2 connected to the planetary carrier 41, so as to drive the vehicle to travel. While the engine 20 inputs power through the sun gear 42, the power output by the motor 30 is transmitted to the planetary carrier 41 through the motor output shaft 302, the motor gear 301, the ring gear 43, and the planetary gear 44 in sequence, and then transmitted to the planetary carrier 41, so as to realize the synchronous input of the engine power and the motor power, and then the power is output through the power output shaft 2, driving the driving wheels of the vehicle to rotate at the first speed, and the vehicle is in the first gear (1st gear speed control gear). The sun gear 42 and the planetary gear 44 have a first speed ratio i1 (or a first transmission ratio) when they are meshed to transmit power. Therefore, when the vehicle is in the first gear, the speed ratio output by the power output shaft 2 is i1.

[0039] like Figure 3As shown, when the first clutch 31 is engaged and the second clutch 32 is engaged, the power output by the engine 20 is transmitted to the intermediate shaft 5 through the power input shaft 1 and the first clutch 31, and then transmitted to the second clutch 32 connected to the intermediate shaft 5, and then transmitted to the planetary carrier 41 connected to the second clutch 32. The engine power input to the planetary carrier 41 is output to the driving wheels of the vehicle through the power output shaft 2 connected to the planetary carrier 41. While the engine 20 inputs power through the planetary carrier 41, the power output by the motor 30 is transmitted to the planetary carrier 41 through the motor output shaft 302, the motor gear 301, the ring gear 43, and the planetary gear 44 in sequence, and then transmitted to the planetary carrier 41, so as to realize the synchronous input of the engine power and the motor power, and then output the power through the power output shaft 2, driving the driving wheels of the vehicle to rotate at the second speed, and the vehicle is in the second gear (second gear speed control gear). When the vehicle is in the second gear, since the power output by the engine 20 does not pass through the mutually meshing sun gear 42 and planetary gear 44, at this time, the speed ratio output by the power output shaft 2 is 1. As described above, the power input of the engine 200 can be selectively connected to the sun gear 42 or the planetary carrier 41 to achieve two transmission speed ratios, and the speed ratio of the vehicle can be infinitely adjusted by the synchronous input of the power of the motor 30 through the ring gear 43. The first gear and the second gear are the gears when the vehicle is in the hybrid mode.

[0040] like Figure 4 As shown, when the first clutch 31 is disengaged and the second clutch 32 is engaged, since the first clutch 31 is arranged between the engine 20 and the second clutch 32, when the first clutch 31 is disengaged, the engine power cannot be transmitted to the planetary gear mechanism, and the power can only be provided by the motor 30. At this time, the vehicle is in pure electric mode, that is, the third gear is a pure electric speed adjustment gear. The power output by the motor 30 is transmitted to the planetary carrier 41 through the ring gear 43, and the motor gear 301 and the ring gear 43 are engaged with a second speed ratio i2 (or a second transmission ratio). Therefore, when the vehicle is in the third gear, the speed ratio output by the power output shaft 2 is i2. In this way, it can be determined whether the vehicle is in hybrid mode or pure electric mode by the engagement or disengagement state of the first clutch 31 and the second clutch 32, and two transmission speed ratios can be achieved in the hybrid mode.

[0041] like Figure 4As shown, in the pure electric mode, the power output shaft 2 can be connected to the ring gear 43, and the power output of the motor 30 is directly transmitted to the power output shaft 2 through the ring gear 43, and then output to the driving wheel of the vehicle, so as to realize the pure electric drive of the vehicle. In the pure electric mode, the motor power is directly output to the power output shaft 2 through the ring gear 43, which can reduce the force transmission path, thereby reducing power loss and improving the pure electric endurance of the vehicle. When the power output shaft 2 is connected to the ring gear 43, the speed ratio output by the power output shaft 2 is also i2. In the pure electric mode, the power of the motor is transmitted through the planetary carrier 41 to ensure power transmission, stability and reliability, and ensure the stability of the vehicle. The positions where the power output shaft 2 is connected to the ring gear 43 or the planetary carrier 41 are respectively provided with locking members to disconnect the connection between the power output shaft 2 and the planetary carrier 41 when the power output shaft 2 is connected to the ring gear 43, or disconnect the connection between the power output shaft 2 and the ring gear 43 when the power output shaft 2 is connected to the planetary carrier 41, so as to meet different power transmission requirements in the pure electric mode.

[0042] In this embodiment, the forward gear and the reverse gear share a common structural design, and the reverse gear function is achieved by reversing the motor 30, which reduces the number of transmission components, reduces the size and weight of the transmission, realizes lightweight transmission, and reduces the manufacturing cost of the transmission.

[0043] The hybrid transmission provided by the embodiment of the utility model is provided with a power input shaft 1, a power output shaft 2, a wet dual clutch, and a planetary gear mechanism. The wet dual clutch includes a first clutch 31 and a second clutch 32. The planetary gear mechanism includes a planet carrier 41, a sun gear 42 and a ring gear 43 to connect the power input shaft 1. The power input shaft 1 is connected to the sun gear 42 through the first clutch 31, the second clutch 32 is connected to the first clutch 31 through the intermediate shaft 5, and the intermediate shaft 5 is also connected to the planet carrier 41 through the second clutch 32. The ring gear 43 is respectively engaged with the planetary gear 44 on the planet carrier 41 and the motor gear 301 of the motor 30. The power output shaft 2 is connected to the planet carrier 41 or the ring gear 43. The driving mode of the vehicle can be switched by the mutual cooperation of the first clutch 31 and the second clutch 32 arranged coaxially and spaced apart, and the engine can be switched by the first clutch 31 in the hybrid mode. The output end of the engine 20 is engaged with the sun gear 42 or the output end of the engine 20 is engaged with the planetary carrier 41 through the second clutch 32, so as to infinitely adjust the vehicle speed ratio, achieve high gear shifting efficiency, and smoothly shift gears without gear shifting jerk, thereby improving the user's gear shifting experience; and in pure electric mode, the motor power can be transmitted to the power output shaft 2 through the planetary carrier 41 or the ring gear 43 to meet different power transmission requirements; the first clutch 31 and the second clutch 32 are independently controlled respectively, which can provide more vehicle speed gears to meet the different speed regulation requirements of the user and further improve the user's gear shifting experience; in addition, the transmission only needs to arrange different clutches along its axial direction and connect them axially with different components of the planetary gear mechanism. The overall structure of the transmission is simple and reasonable, and fewer components are required for gear shifting, thereby further improving the gear shifting efficiency, reducing the volume and weight of the transmission, achieving lightweight transmission, and reducing the manufacturing cost of the transmission. In addition, the wet dual clutch used in this embodiment has higher shifting efficiency and shifting response speed, and the first clutch 31 and the second clutch 32 are respectively located in oil tanks full of lubricating oil instead of idling, so that the clutch can engage and disengage more smoothly, thereby improving the smoothness and comfort of shifting; in addition, the clutch is always cooled and protected by the lubricating oil, and can withstand higher temperatures and more frequent shifting, thereby improving the durability of the entire transmission system.

[0044] In some embodiments, the driven part of the first clutch 31 is connected to the power input shaft 1, the first active part of the first clutch 31 is connected to the sun gear 42 through the first output shaft 311, and the second active part of the first clutch 31 is connected to the intermediate shaft 5 through the second output shaft 312;

[0045] The driven part of the second clutch 32 is connected to the intermediate shaft 5 , and the active part of the second clutch 32 is connected to the planet carrier 41 through the third output shaft 321 .

[0046] The second output shaft 312, the intermediate shaft 5 and the third output shaft 321 are all hollow shafts sleeved on the outer periphery of the first output shaft 311. The first output shaft 311 passes through the second output shaft 312, the intermediate shaft 5 and the third output shaft 321 in sequence and is connected to the center of the sun gear 42 in the planetary carrier 41. The active part can be the driven disc of the clutch, and the driven part can be the flywheel of the clutch. After the driven disc is engaged with the hub of the flywheel, the driven disc rotates, which can drive the flywheel to rotate synchronously to achieve power transmission. After the first active part of the first clutch 31 is engaged with the driven part of the first clutch 31, the power input shaft 1 is engaged with the sun gear 42 through the first output shaft 311 to achieve the transmission of the engine power to the sun gear 42; after the second active part of the first clutch 31 is engaged with the driven part of the first clutch 31, and the active part of the second clutch 32 is engaged with the driven part of the second clutch 32, the power input shaft 1, the second output shaft 312, the intermediate shaft 5 and the third output shaft 321 are engaged in sequence to achieve the transmission of the engine power to the planetary carrier 41.

[0047] By structurally designing the two independent first clutches 31 and second clutches 32 , it is convenient for the power input shaft 1 to be connected to the sun gear 42 through the first clutch 31 , and for the power input shaft 1 to be connected to the planetary carrier 41 through the first clutch 31 and the second clutch 32 .

[0048] In some embodiments, the ring gear 43 is a double-sided ring gear, which is arranged on the radial outside of the planetary carrier 41, the inner ring gear 431 of the double-sided ring gear is meshed with the planetary gear 44, the outer ring gear 432 of the double-sided ring gear is meshed with the motor gear 301, and the inner ring gear 431 of the double-sided ring gear is connected to the power output shaft 2 through the first transmission gear 61 or the first transmission gear group.

[0049] The double-sided gear ring is installed on the radial outer side of the planetary carrier 41, and the inner gear ring 431 of the double-sided gear ring is meshed with the planetary gear 44, and the outer gear ring 432 of the double-sided gear ring is meshed with the motor gear 301, so that the power output by the motor 30 can be smoothly and reliably transmitted to the planetary carrier 41 connected to the planetary gear 44 through the double-sided gear ring. The frame body of the planetary carrier 41 is annular, and the annular outer side of the frame body is the radial outer side of the planetary carrier 41. The double-sided gear ring has a certain axial length, and its inner gear ring 431 is meshed with the first transmission gear 61 installed on the power output shaft 2, and the motor power is output to the power output shaft 2 after passing through the gear ring 43. The inner gear ring 431 is connected to the power output shaft 2, which can reduce the size of the transmission along the vehicle height direction and the vehicle width direction, reduce the overall volume of the transmission, and meet the different layout requirements of the vehicle. For example, a compact layout of the whole vehicle can be achieved, or the height of the transmission can be reduced to provide a larger vehicle interior space. In this embodiment, only the first transmission gear 61 is provided to reduce the number of components, reduce the weight of the transmission, shorten the force transmission path, and reduce power loss.

[0050] In a specific implementation, the inner ring 431 can be connected to the power output shaft 2 through a first transmission gear set according to the distance between the motor output shaft 302 and the power output shaft 2, and the first transmission gear set includes at least two transmission gears.

[0051] When the above-mentioned double-sided ring gear is used, the frame of the planetary carrier 41 can be set smaller, and the planetary gear 44 is installed on the annular frame. A part of the planetary gear 44 is located on the radial inner side of the planetary carrier 41 and meshes with the sun gear 42, and the other part is located on the radial inner side of the planetary carrier 41 and meshes with the ring gear 43, thereby reducing the volume and weight of the planetary gear mechanism.

[0052] In other embodiments, the ring gear 43 may include inner teeth arranged on the inner side of the ring of the planet carrier 41, and outer teeth arranged on the outer side of the ring of the planet carrier 41. The planetary gears 44 are all located on the radial inner side of the planet carrier 41 and mesh with the inner teeth. The outer teeth mesh with the motor gear 301. The outer teeth can also be connected to the power output shaft 2 through the first transmission gear 61 or the first transmission gear set. In this case, it is necessary to set an additional support member on the radial inner side of the planet carrier 41 to install the planetary gear 44, or set the radial size (dimensions along the vehicle height direction and the vehicle width direction) of the planet carrier 41 to be larger to mesh with the motor gear 301. Since the ring gear 43 is also connected to the power output shaft 2, the weight of the planet carrier 41 will be increased. In addition, when the ring gear 43 and the planet carrier 41 are an integrated structure, the replacement and maintenance costs are high.

[0053] In some embodiments, a planet carrier output shaft 411 is provided on the planet carrier 41, and the planet carrier output shaft 411 is connected to the power output shaft 2 through a second transmission gear set, and the second transmission gear set includes a second transmission gear 62 and a third transmission gear 63 that mesh with each other, and the second transmission gear 62 is installed on the planet carrier output shaft 411, and the third transmission gear 63 is installed on the power output shaft 2, and the third transmission gear 63 meshes with the inner gear ring 431 of the double-sided gear ring. The planet carrier output shaft 411 is set at the center of the output end of the planet carrier 41, and is connected to the power output shaft 2 through the second transmission gear set. The second transmission gear set can be used to change the speed ratio of the vehicle, output a larger torque, and meet the torque requirement of the vehicle. The second transmission gear set has a third speed ratio i3 (or a third transmission ratio). When the vehicle is in the first gear, the speed ratio output by the power output shaft 2 is i1*i3; when the vehicle is switched to the second gear, the speed ratio output by the power output shaft 2 is i3; when the vehicle is switched to the third gear, the speed ratio output by the power output shaft 2 is i2*i3.

[0054] In a specific implementation, multiple sets of second transmission gear sets can be provided according to the vehicle model, or an intermediate transmission gear can be provided between the second transmission gear 62 and the third transmission gear 63, etc. The specific structure of the second transmission gear set is not specifically limited in the present invention.

[0055] In some embodiments, the number of the planetary gears 44 is at least two, and the at least two planetary gears 44 are respectively mounted on the planetary gear shafts of the planetary carrier 41 through sliding bearings.

[0056] For example, in this embodiment, a planetary gear 44 is rotatably mounted on the upper and lower sides of the planetary carrier 41, and the inner and outer sides of the planetary gear 44 are respectively meshed with the sun gear 42 and the inner gear ring 431 of the double-sided gear ring. The planetary gear 44 can also be mounted on the left and right sides of the planetary carrier 41, and respectively meshed with the left and right sides of the sun gear 42 and the left and right sides of the inner gear ring 431. The load can be shared by multiple planetary gears 44, and the radial forces of the sun gear 42 and the gear ring 43 can be balanced by the planetary gear 44, thereby improving the bearing capacity of the planetary gear structure 4 and ensuring the smoothness of the transmission. The number of planetary gears 44 can be set according to the shape of the planetary carrier 41. For example, when the shape of the planetary carrier 41 is square, a planetary gear 44 can be set at each of the four corners of the planetary carrier 41.

[0057] A second embodiment of the present invention provides a hybrid drive system, including an engine 20 and a motor 30 , and the hybrid drive system also includes the above-mentioned hybrid-specific transmission.

[0058] In some embodiments, Figure 5 As shown, the hybrid drive system further includes a driving oil pump 40 , which is connected to a filter 501 in an oil pan 50 via a liquid inlet line 401 , and is connected to an oil circuit of a planetary gear mechanism via a liquid outlet line 402 .

[0059] The liquid outlet pipeline 532 can be connected to the ring gear 43, and then the planetary gear 44, the sun gear 42, the power input shaft 1, the planetary carrier 41, the power output shaft 2 and other components are lubricated and cooled through the oil circuits on the various components of the planetary gear mechanism. Since the planetary carrier 41 is connected to the second clutch 32, and the sun gear 42 is connected to the first clutch 31, the oil circuit between the planetary carrier 41 and the second clutch 32, and the oil circuit between the sun gear 42 and the first clutch 31 can be used in conjunction with the clutch's lubricating oil tank to lubricate and cool the clutch. As described above, the operation of the driving oil pump 40 can fully absorb the filtered lubricating oil in the oil pan 50 to lubricate and cool the transmission.

[0060] In some embodiments, Figure 5 As shown, the wet dual clutch also includes a first hydraulic drive device connected to the first clutch 31 and a second hydraulic drive device connected to the second clutch 32, the first hydraulic drive device includes a first hydraulic pump 33, the second hydraulic drive device includes a second hydraulic pump 34, and the first outlet pipeline of the first hydraulic pump 33 and the second outlet pipeline of the second hydraulic pump 34 are respectively connected to the liquid outlet pipeline 402.

[0061] In this embodiment, the wet dual clutch is provided with two hydraulic pumps, each of which is connected to an oil inlet tank to supply hydraulic oil to the first clutch 31 and the second clutch 32. The outlet pipeline 532 of the driving oil pump 40 can be connected to the driving oil circuits of the first clutch 31 and the second clutch 32 respectively, and the clutch is lubricated and cooled by the oil filtered by the oil pan and the oil in the lubricating oil tank of the clutch.

[0062] In some embodiments, the first hydraulic drive device also includes a first solenoid valve 35 electrically connected or signal-connected to the first hydraulic pump 33, and the second hydraulic drive device also includes a second solenoid valve 36 electrically connected or signal-connected to the second hydraulic pump 34. The first solenoid valve 35 and the second solenoid valve 36 are also electrically connected or signal-connected to the driving oil pump 40, respectively.

[0063] The first solenoid valve 35 is used to control the first hydraulic pump 33, so as to supply oil to the first clutch 31 placed in the first oil inlet groove; the second solenoid valve 36 is used to control the second hydraulic oil pump 34, so as to supply oil to the second clutch 32 placed in the second oil inlet groove. The first solenoid valve 35 and the second solenoid valve 36 can also be electrically connected or signal-connected to the driving oil pump 40, respectively, so as to perform linkage control on the lubrication and cooling of the first clutch 31 and the second clutch 32 according to the oil supply of the driving oil pump 40, so as to improve the control accuracy. In this embodiment, the wet dual clutch adopts an independent dual clutch and is controlled by a separate hydraulic pressure, so that the overall size of the clutch is small and easy to maintain.

[0064] In some embodiments, the driving oil pump 40 is connected to the planet carrier 41 or the ring gear 43 through a transmission mechanism.

[0065] The driving oil pump 40 can be connected to the output end of the planetary carrier 41 through a transmission mechanism such as gears, so that the power output by the planetary gear mechanism can be used to power the driving oil pump 40; in pure electric mode, the driving oil pump 40 can be connected to the ring gear 43 through a transmission mechanism, so that the power output by the motor is transmitted to the driving oil pump 40 through the ring gear 43, and power is transmitted to the driving oil pump 40 without setting up an additional driving motor, etc., thereby fully utilizing the power of the engine 20 and the motor 30, reducing components, and realizing lightweight transmission.

[0066] A third embodiment of the present invention provides a vehicle, comprising the above-mentioned hybrid drive system.

[0067] The hybrid drive system and the vehicle correspond to the hybrid-specific transmission of the above-mentioned embodiment. Any optional items in the hybrid-specific transmission embodiment are also applicable to the embodiments of the hybrid drive system and the vehicle, and will not be repeated here.

[0068] The above description is only a preferred embodiment of the utility model and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the utility model is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the utility model (but not limited to) by each other to form a technical solution.

[0069] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A hybrid transmission, characterized in that: It includes a power input shaft, a power output shaft, a wet dual clutch, and a planetary gear mechanism. The wet dual clutch includes a first clutch and a second clutch. The planetary gear mechanism includes a planet carrier, a sun gear and a ring gear. The output end of the engine is connected to the power input shaft, and the power input shaft is connected to the sun gear through the first clutch. The second clutch is connected to the first clutch through an intermediate shaft, and the intermediate shaft is also connected to the planet carrier through the second clutch. The ring gear is respectively meshed with the planetary gears on the planet carrier and the motor gears of the motor, and the power output shaft is connected to the planet carrier or the ring gear.

2. The hybrid transmission according to claim 1, characterized in that: The driven part of the first clutch is connected to the power input shaft, the first active part of the first clutch is connected to the sun gear through the first output shaft, and the second active part of the first clutch is connected to the intermediate shaft through the second output shaft; The driven part of the second clutch is connected to the intermediate shaft, and the active part of the second clutch is connected to the planet carrier through the third output shaft.

3. The hybrid transmission according to claim 1, characterized in that: The gear ring is a double-sided gear ring, which is arranged on the radial outside of the planetary carrier, the inner gear ring of the double-sided gear ring is meshed with the planetary gear, the outer gear ring of the double-sided gear ring is meshed with the motor gear, and the inner gear ring of the double-sided gear ring is connected to the power output shaft through a first transmission gear or a first transmission gear set.

4. The hybrid transmission according to claim 3, characterized in that: The planetary carrier is provided with a planetary carrier output shaft, and the planetary carrier output shaft is connected to the power output shaft through a second transmission gear set. The second transmission gear set includes a second transmission gear and a third transmission gear that are meshed with each other. The second transmission gear is installed on the planetary carrier output shaft, and the third transmission gear is installed on the power output shaft. The third transmission gear is meshed with the inner gear ring of the double-sided gear ring.

5. A hybrid drive system, comprising an engine and a motor, characterized in that: It also includes a hybrid-specific transmission as described in any one of claims 1-4.

6. The hybrid drive system according to claim 5, characterized in that: It also includes a driving oil pump, which is connected to the filter in the oil pan through a liquid inlet pipeline, and is connected to the oil circuit of the planetary gear mechanism through a liquid outlet pipeline.

7. The hybrid drive system according to claim 6, characterized in that: The wet dual clutch also includes a first hydraulic drive device connected to the first clutch and a second hydraulic drive device connected to the second clutch, the first hydraulic drive device includes a first hydraulic pump, the second hydraulic drive device includes a second hydraulic pump, and a first outlet pipeline of the first hydraulic pump and a second outlet pipeline of the second hydraulic pump are respectively connected to the liquid outlet pipeline.

8. The hybrid drive system according to claim 7, characterized in that: The first hydraulic drive device also includes a first solenoid valve electrically connected or signal-connected to the first hydraulic pump, and the second hydraulic drive device also includes a second solenoid valve electrically connected or signal-connected to the second hydraulic pump. The first solenoid valve and the second solenoid valve are also electrically connected or signal-connected to the driving oil pump, respectively.

9. The hybrid drive system according to claim 5, characterized in that: The driving oil pump is connected to the planetary carrier or the ring gear through a transmission mechanism.

10. A vehicle, characterized in that: Including the hybrid drive system as described in claim 9.

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