Multi-gear hybrid transmission and vehicle

Abstract

A multi-gear hybrid transmission and an automobile. The multi-gear hybrid transmission includes an engine (110), a clutch (120), a first motor (130), a second motor (140), a planetary gear mechanism (150), a first input shaft (160), a second input shaft (170), an output shaft (180), a brake (190), a synchronizer (210), and a first gear pair (220) and a second gear pair (230) with different speed ratios; the flywheel output end of the engine (110) is connected to the first input shaft (160), the rotor of the first motor (130) is drivingly connected to the ring gear (154), the brake (190) is connected to the sun gear (151), the second input shaft (170) is sleeved outside the first input shaft (160) and is connected to the planet carrier (153); the first driving gear (221) in the first gear pair (220) is coaxially arranged with the motor shaft of the second motor (140), and the second driving gear (231) in the second gear pair (230) is coaxially arranged with the second input shaft (170); the synchronizer (210) includes a first synchronizer (211) and a second synchronizer (212), the first synchronizer (211) is used to selectively connect the motor shaft of the second motor (140) and the second input shaft (170), and the second synchronizer (212) is used to selectively connect the first driven gear (222) in the first gear pair (220) and the output shaft (180).

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly relates to a multi-gear hybrid transmission and an automobile applying the multi-gear hybrid transmission. Background Art

[0002] A hybrid vehicle is a vehicle that uses multiple energy sources, usually a conventional internal combustion engine (ICE) using liquid fuel and an electric motor using electric energy to drive the vehicle. Hybrid vehicles can operate in multiple driving modes. However, the battery capacity is limited, and the power is mainly provided by engine combustion.

[0003] In the existing hybrid solutions, in the dual-motor mode, one of the motors can only be used for power generation or starting the engine and cannot participate in driving together with the other motor. Moreover, due to the current layout space problem, they are all 1st or 2nd gear solutions, and the drive motor can only be arranged off-axis, resulting in low system transmission efficiency and insufficient power performance. Summary of the Invention

[0004] The main purpose of this application is to provide a multi-gear hybrid transmission, aiming to solve the problems of low system transmission efficiency and insufficient power performance.

[0005] To achieve the above object, the multi-gear hybrid transmission proposed in this application includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios;

[0006] The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the planet carrier;

[0007] The first gear pair is connected between the motor shaft of the second motor and the output shaft. The second gear pair is connected between the second input shaft and the output shaft. Among them, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, and the second driving gear in the second gear pair is coaxially arranged with the second input shaft;

[0008] The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor;

[0009] The synchronizer includes a first synchronizer and a second synchronizer. The first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft, and the second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft.

[0010] In this application, a planetary gear mechanism is provided at the flywheel output end of the engine, and the first motor is drivingly connected to the ring gear of the planetary gear mechanism. Thus, the arrangement of the first motor constitutes a P1 structure. The second motor is connected to the end of the first input shaft and can directly drive the output shaft. Thus, the arrangement of the second motor constitutes a P3 structure. The first gear pair and the second gear pair are arranged at intervals on the first input shaft and are located between the first motor and the second motor. Thus, the multi-gear hybrid transmission of this application adopts a P1+P3 structure. And by selectively connecting the motor shaft of the second motor and the second input shaft through the first synchronizer, and selectively connecting the first driven gear in the first gear pair and the output shaft through the second synchronizer, the gears of the second motor and the engine can be utilized mutually. Therefore, within an extremely short axial space, by using the combination of the first gear pair, the second gear pair, the planetary gear mechanism, the clutch, and the brake, the engine has 3 gears, and the second motor can achieve 1 gear as required and 3 gears in a combined manner as required. It can achieve series driving (the second motor drives and the first motor generates electricity), and can achieve parallel driving (the engine and the second motor drive in parallel). At the same time, through the above settings, the operating speed of the second motor can be reduced, the loss of the second motor is small, the gear transmission chain is short and the efficiency is high, and the transmission structure is simple, the space layout is compact, the clutch and the brake can be slip-controlled during the gear shifting process, and power shifting can be achieved. Both the mode switching and the gear switching can be achieved without power interruption, taking into account the high-efficiency output under low, medium and high vehicle speeds and various loads and a good driving feeling.

[0011] In an embodiment, the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios;

[0012] The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the planet carrier;

[0013] The first gear pair is connected between the motor shaft of the second motor and the output shaft, and the second gear pair is connected between the second input shaft and the output shaft. Wherein, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, and the second driving gear in the second gear pair is sleeved on the second input shaft loosely;

[0014] The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor;

[0015] The synchronizer includes a first synchronizer, a second synchronizer and a third synchronizer. The first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft. The second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft. The third synchronizer is used to selectively connect the second driving gear and the second input shaft.

[0016] In one embodiment, the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and first and second gear pairs with different speed ratios;

[0017] The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and connected to the planet carrier;

[0018] The first gear pair is connected between the motor shaft of the second motor and the output shaft, and the second gear pair is connected between the second input shaft and the output shaft. Wherein, the first driving gear in the first gear pair is sleeved on the motor shaft of the second motor loosely, and the second driving gear in the second gear pair is fixedly sleeved on the second input shaft;

[0019] The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor;

[0020] The synchronizer is used to selectively connect the motor shaft of the second motor and the first driving gear and to selectively connect the motor shaft of the second motor and the second input shaft.

[0021] In one embodiment, the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, and first and second gear pairs with different speed ratios;

[0022] The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the planet carrier;

[0023] The first gear pair is connected between the motor shaft of the second motor and the output shaft. The second gear pair is connected between the second input shaft and the output shaft. Among them, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is fixedly sleeved on the second input shaft. The second driven gear in the second gear pair is fixedly sleeved on the output shaft;

[0024] The clutch includes a first clutch and a second clutch. The first clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor. The second clutch is used to couple or decouple the ring gear and the planet carrier.

[0025] In one embodiment, the multi-speed hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and first and second gear pairs with different speed ratios;

[0026] The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The sun gear is coaxially arranged with the first input shaft. The flywheel output end of the engine is connected to the ring gear. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear;

[0027] The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is sleeved on the first input shaft loosely. The second driven gear in the second gear pair is fixedly sleeved on the output shaft;

[0028] The clutch is used to couple or decouple the ring gear and the planet carrier;

[0029] The synchronizer is used to couple or decouple the first driving gear and the first input shaft and to couple or decouple the second driving gear and the first input shaft.

[0030] In one embodiment, the multi-speed hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and first and second gear pairs with different speed ratios;

[0031] The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a carrier. The sun gear is coaxially arranged with the first input shaft. The flywheel output end of the engine is connected to the ring gear. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear;

[0032] The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is fixedly sleeved on the first input shaft. The second driven gear in the second gear pair is fixedly sleeved on the output shaft;

[0033] The clutch is used to couple or decouple the ring gear and the carrier.

[0034] In one embodiment, the rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

[0035] In one embodiment, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

[0036] In one embodiment, the multi-speed hybrid transmission further includes a differential. The differential is provided with a differential ring gear. A main reduction gear is installed on the output shaft, and the main reduction gear is constantly meshed with the differential ring gear.

[0037] This application also provides an automobile, including the multi-speed hybrid transmission as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0039] Figure 1 It is a schematic structural diagram of an embodiment of the multi-speed hybrid transmission of the present application;

[0040] Figure 2 It is a schematic structural diagram of another embodiment of the multi-speed hybrid transmission of the present application;

[0041] Figure 3 It is a schematic structural diagram of another embodiment of the multi-speed hybrid transmission of the present application;

[0042] Figure 4Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application;

[0043] Figure 5 Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application;

[0044] Figure 6 Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application;

[0045] Figure 7 Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application;

[0046] Figure 8 Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application;

[0047] Figure 9 Schematic structural diagram of another embodiment of the multi-gear hybrid transmission of the present application.

[0048] Explanation of the reference numerals in the drawings:

[0049] Label Name Label Name 110 Engine 180 Output shaft 120 Clutch 190 Brake 121 First clutch 210 Synchronizer 122 Second clutch 211 First synchronizer 130 First motor 212 Second synchronizer 131 Motor drive gear 220 First gear pair 140 Second motor 221 First drive gear 150 Planetary gear mechanism 222 First driven gear 151 Sun gear 230 Second gear pair 152 Planet gear set 231 Second drive gear 153 Planet carrier 232 Second driven gear 154 Ring gear 240 Differential 160 First input shaft 241 Differential ring gear 170 Second input shaft 250 Final drive gear

[0050] The realization of the purpose, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0052] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, the descriptions involving "first", "second", etc. in this application are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] This application provides a multi-gear hybrid transmission.

[0055] Please refer to Figure 1 and Figure 2 In the first embodiment, the multi-gear hybrid transmission proposed in this application includes an engine 110, a clutch 120, a first motor 130, a second motor 140, a planetary gear mechanism 150, a first input shaft 160, a second input shaft 170, an output shaft 180, a brake 190, a synchronizer 210, and a first gear pair 220 and a second gear pair 230 that are arranged at intervals in the axial direction of the first input shaft 160 and have different speed ratios.

[0056] The engine 110, the first motor 130, and the second motor 140 are the power sources of the multi-gear hybrid transmission of this application. The engine 110 can be an internal combustion engine that burns gasoline or diesel, that is, it can be a gasoline engine 110 or a diesel engine 110. Since the multi-gear hybrid transmission of this application can enable the engine 110, the first motor 130, and the second motor 140 to all provide driving force, the displacement of the engine 110 can be made relatively small accordingly, thus reducing the cost of the vehicle. The first motor 130 can be a disk-type permanent magnet DC brushless motor, which has two functions of power generation and driving. The second motor 140 can also adopt a disk-type permanent magnet DC brushless motor, and this application does not limit this. The second motor 140 of this application is arranged on the side of the first output shaft 180 away from the engine 110. Such a layout makes the entire multi-gear hybrid transmission have the advantages of a compact overall structure and reasonable layout. It can be understood that the multi-gear hybrid transmission of this application also includes a housing (not shown), and the stators of the first motor 130 and the second motor 140 are fixed to the housing.

[0057] The flywheel output end of the engine 110 is connected to the first input shaft 160. In one connection method, the flywheel output end of the engine 110 and the first input shaft 160 can be connected by splines, and such a connection structure is simple and reliable. The planetary gear mechanism 150 is a single-row planetary gear mechanism 150, which includes a sun gear 151, a planetary gear set 152, a ring gear 154, and a planet carrier 153. The rotor of the first motor 130 is drivingly connected to the ring gear 154. The brake 190 is connected to the sun gear 151. The second input shaft 170 is sleeved outside the first input shaft 160 and is connected to the planet carrier 153. In this embodiment, the first input shaft 160 and the second input shaft 170 are arranged in parallel with the output shaft 180, and the first gear pair 220 and the second gear pair 230 are arranged in parallel.

[0058] The first gear pair 220 is connected between the motor shaft of the second motor 140 and the output shaft 180, and the second gear pair 230 is connected between the second input shaft 170 and the output shaft 180. Among them, the first driving gear 221 in the first gear pair 220 is coaxially arranged with the motor shaft of the second motor 140, and the second driving gear 231 in the second gear pair 230 is coaxially arranged with the second input shaft 170.

[0059] The clutch 120 can be a dry clutch 120 or a wet clutch 120. The clutch 120 is used to couple or separate the first input shaft 160 and the motor shaft of the second motor 140. From the above content, it can be seen that the second motor 140 of this application is located at one end of the first input shaft 160 away from the engine 110. Therefore, the clutch 120 is also arranged at one end of the first input shaft 160 away from the engine 110, and the clutch hub of the clutch 120 is fixed on the motor shaft of the second motor 140.

[0060] The synchronizer 210 includes a first synchronizer 211 and a second synchronizer 212. The first synchronizer 211 is used to selectively connect the motor shaft of the second motor 140 and the second input shaft 170, and the second synchronizer 212 is used to selectively connect the first driven gear 222 in the first gear pair 220 and the output shaft 180.

[0061] In this application, a planetary gear mechanism 150 is provided at the flywheel output end of the engine 110, and the first motor 130 is drivingly connected to the ring gear 154 of the planetary gear mechanism 150. Thus, the arrangement of the first motor 130 constitutes the P1 structure. The second motor 140 is connected to the end of the first input shaft 160 and can directly drive the output shaft 180. Thus, the arrangement of the second motor 140 constitutes the P3 structure. The first gear pair 220 and the second gear pair 230 are arranged at intervals on the first input shaft 160 and are located between the first motor 130 and the second motor 140. Thus, the multi-speed hybrid transmission of this application adopts the P1+P3 structure. And by selectively connecting the motor shaft of the second motor 140 and the second input shaft 170 through the first synchronizer 211, and selectively connecting the first driven gear 222 in the first gear pair 220 and the output shaft 180 through the second synchronizer 212, the gears of the second motor 140 and the engine 110 can be utilized mutually. Thus, within an extremely short axial space, by using the combination of the first gear pair 220, the second gear pair 230, the planetary gear mechanism 150, the clutch 120, and the brake 190, the engine 110 has 3 gears, the second motor 140 can achieve 1 gear as required and a combination of 3 gears as required, can achieve series driving (the second motor 140 drives the motor, and the first motor 130 generates electricity), can achieve parallel driving (the engine 110 and the second motor 140 drive in parallel). At the same time, through the above settings, the operating speed of the second motor 140 can be reduced, the loss of the second motor 140 is small, the gear transmission chain is short and the efficiency is high, and the transmission structure is simple, the space layout is compact. The clutch 120 and the brake 190 can be slip-controlled during the shifting process, and power shifting can be achieved. Both the mode switching and the gear switching can be achieved without power interruption, taking into account the high-efficiency output under low, medium and high vehicle speeds and various loads and a good driving feeling.

[0062] Further, in this embodiment, the multi-speed hybrid transmission further includes a battery pack (not shown). The first motor 130 is connected to the battery pack, and the second motor 140 is also connected to the battery pack. The first gear pair 220 is a low-gear gear pair for forming the first gear, while the second gear pair 230 is a common gear pair for forming the second and third gears. The multi-speed hybrid transmission of this application has multiple driving modes. Among them, the main working modes are shown in the following table:

[0063]

[0064]

[0065] That is:

[0066] In the pure electric first gear mode, the second motor 140 is powered by the battery pack. The motor shaft of the second motor 140 transmits power to the output shaft 180 through the first gear pair 220. At this time, the engine 110 is not started. The first driven gear 222 of the first gear pair 220 and the output shaft 180 are combined through the second synchronizer 212 to achieve the pure electric first gear operation mode driven by the second motor 140 alone.

[0067] In the pure electric third gear mode, the engine 110 is not started, and the second motor 140 is powered by the battery pack. At this time, the first synchronizer 211 combines the motor shaft of the second motor 140 and the second input shaft 170. Then, the power of the second motor 140 is transmitted to the output shaft 180 through the second input shaft 170 and the second gear pair 230, thereby achieving the pure electric third gear drive mode.

[0068] In the series first gear mode, the engine 110 starts and drives the first motor 130 to generate electricity through the planetary gear mechanism 150 to supply power to the second motor 140. At this time, the clutch 120 does not combine the first input shaft 160 and the motor shaft of the second motor 140. The second motor 140 outputs power to the wheels through the power transmission path of the pure electric first gear again.

[0069] In the series third gear mode, the engine 110 starts and drives the first motor 130 to generate electricity through the planetary gear mechanism 150 to supply power to the second motor 140. At this time, the clutch 120 does not combine the first input shaft 160 and the motor shaft of the second motor 140. The second motor 140 outputs power to the wheels through the power transmission path of the pure electric third gear again.

[0070] In the parallel first gear mode, the engine 110 starts. At this time, the clutch 120 combines the first input shaft 160 and the motor shaft of the second motor 140, and the second synchronizer 212 connects the first driven gear 222 in the first gear pair 220 and the output shaft 180. In this way, the engine 110 and the second motor 140 achieve the parallel output of the first gear at the same time.

[0071] In the parallel second gear mode, the engine 110 starts. At this time, the clutch 120 combines the first input shaft 160 and the motor shaft of the second motor 140. Both the first synchronizer 211 and the second synchronizer 212 are in the separated state. At this time, the brake 190 starts to lock the sun gear 151 of the planetary gear mechanism 150. Then, the power of the engine 110 and the second motor 140 will both be transmitted to the output shaft 180 through the second gear pair 230, and further achieve the power output of the parallel second gear mode.

[0072] In the parallel three-gear mode, the engine 110 starts. At this time, the clutch 120 couples the first input shaft 160 and the motor shaft of the second motor 140. The brake 190 is not started, and the second synchronizer 212 is in the disengaged state. The first synchronizer 211 couples the motor shaft of the second motor 140 and the second input shaft 170. Then, the power of the engine 110 and the power of the second motor 140 can both be transmitted in the direction of the output shaft 180 through the second gear pair 230, realizing the parallel three-gear drive mode.

[0073] Please refer to Figure 3 , Figure 3 This is the second embodiment of the multi-gear hybrid transmission of the present application. The difference between the second embodiment and the first embodiment is that the second driving gear 231 in the second gear pair 230 has become sleeved on the second input shaft 170, and the synchronizer 210 is set to three, namely the first synchronizer 211, the second synchronizer 212, and the third synchronizer 210. The first synchronizer 211 is used to selectively connect the motor shaft of the second motor 140 and the second input shaft 170. The second synchronizer 212 is used to selectively connect the first driven gear 222 in the first gear pair 220 and the output shaft 180. The third synchronizer 210 is used to selectively connect the second driving gear 231 and the second input shaft 170. The solution of this embodiment, while having the advantages of the first embodiment, also adds one more gear, making it more in line with the driving requirements of different road conditions during the actual use of the vehicle.

[0074] Please refer to Figure 4 , Figure 4 This is the third embodiment of the multi-gear hybrid transmission of the present application. Compared with the first embodiment, the following structural adjustments have been made to the third embodiment. Among them, the first driving gear 221 in the first gear pair 220 is sleeved on the motor shaft of the second motor 140, the first driven gear 222 in the first gear pair 220 is fixedly sleeved on the output shaft 180, and the synchronizer 210 is changed from two in the first embodiment to one. This single synchronizer 210 can realize two functions of selectively connecting the motor shaft of the second motor 140 and the first driving gear 221 and selectively connecting the motor shaft of the second motor 140 and the second input shaft 170. This embodiment can simplify the structure of the entire multi-gear hybrid transmission.

[0075] Please refer to Figure 5 , Figure 5This is the fourth embodiment of the multi-gear hybrid transmission of the present application. Compared with the first embodiment, the first synchronizer 211 and the second synchronizer 212 are cancelled. The first driven gear 222 in the first gear pair 220 is fixedly sleeved on the output shaft 180, and there are two clutches 120, including the first clutch 121 and the second clutch 122. The first clutch 121 is used to couple or decouple the first input shaft 160 and the motor shaft of the second motor 140, and the second clutch 122 is used to couple or decouple the ring gear 154 and the planet carrier 153. In this embodiment, by adding the second clutch 122, when shifting to the third gear, the second clutch 122 is coupled, so that the ring gear 154 and the planet carrier 153 of the planetary gear mechanism 150 have the same speed, and the speed ratio of the planetary mechanism is 1 at this time. Thus, the overall structure also has the advantage of being relatively compact.

[0076] Please refer to Figure 6 and Figure 7 , Figure 6 and Figure 7 This is the fifth embodiment of the multi-gear hybrid transmission of the present application. In the fifth embodiment, the multi-gear hybrid transmission includes an engine 110, a clutch 120, a first motor 130, a second motor 140, a planetary gear mechanism 150, a first input shaft 160, an output shaft 180, a brake 190, and a first gear pair 220 and a second gear pair 230 with different speed ratios.

[0077] The planetary gear mechanism 150 includes a sun gear 151, a planet gear set 152, a ring gear 154, and a planet carrier 153. The sun gear 151 is coaxially arranged with the first input shaft 160. The flywheel output end of the engine 110 is connected to the ring gear 154. The rotor of the first motor 130 is drivingly connected to the ring gear 154. The brake 190 is connected to the sun gear 151.

[0078] The first driving gear 221 in the first gear pair 220 is coaxially arranged with the motor shaft of the second motor 140. The first driven gear 222 in the first gear pair 220 is fixedly sleeved on the output shaft 180. The second driving gear 231 in the second gear pair 230 is sleeved on the first input shaft 160 loosely. The second driven gear 232 in the second gear pair 230 is fixedly sleeved on the output shaft 180. The clutch 120 is used to couple or decouple the ring gear 154 and the planet carrier 153. The synchronizer 210 is used to couple or decouple the first driving gear 221 and the first input shaft 160 and to couple or decouple the second driving gear 231 and the first input shaft 160. In this embodiment, compared with the first embodiment, the number of input shafts is reduced, and the installation position of the clutch 120 is changed. While achieving various driving modes of the first embodiment, it also has the advantage of a compact structure.

[0079] Please refer to Figure 8 and Figure 9 , Figure 8 and Figure 9 This is the sixth embodiment of the multi-speed hybrid transmission of the present application. In the sixth embodiment, the multi-speed hybrid transmission includes an engine 110, a clutch 120, a first motor 130, a second motor 140, a planetary gear mechanism 150, a first input shaft 160, an output shaft 180, a brake 190, and a first gear pair 220 and a second gear pair 230 with different speed ratios.

[0080] The planetary gear mechanism 150 includes a sun gear 151, a planetary gear set 152, a ring gear 154 and a planet carrier 153. The sun gear 151 is coaxially arranged with the first input shaft 160. The flywheel output end of the engine 110 is connected to the ring gear 154. The rotor of the first motor 130 is transmission-connected to the ring gear 154. The brake 190 is connected to the sun gear 151.

[0081] The first driving gear 221 in the first gear pair 220 is coaxially arranged with the motor shaft of the second motor 140, the first driven gear 222 in the first gear pair 220 is fixedly sleeved on the output shaft 180, the second driving gear 231 in the second gear pair 230 is fixedly sleeved on the first input shaft 160, the second driven gear 232 in the second gear pair 230 is fixedly sleeved on the output shaft 180, and the clutch 120 is used to combine or separate the ring gear 154 and the planet carrier 153. Compared with the fifth embodiment, the synchronizer 210 is omitted in this embodiment, so that the overall structure is more compact and the cost is lower, and multiple driving modes can also be realized to meet driving needs.

[0082] In any of the above embodiments of the present application, the multi-speed hybrid transmission further includes a differential 240, wherein the differential 240 is provided with a differential gear ring 241, and a main reduction gear 250 is provided on the output shaft 180, wherein the main reduction gear 250 is constantly meshed with the differential gear ring 241, wherein the main reduction gear 250 is located on the output shaft 180 between the first gear pair 220 and the second gear pair 230, or the main reduction gear 250 is located on the output shaft 180 on a side of the first gear pair 220 away from the second gear pair 230, or the main reduction gear 250 is located on the output shaft 180 on a side of the second gear pair 230 away from the first gear pair 220, that is, the position of the main reduction gear 250 on the output shaft 180 can be adjusted as needed, thereby making it easier to carry out structural arrangement of the multi-speed hybrid transmission of the present application, and making its overall structure compact.

[0083] In this embodiment, the first motor 130 is arranged at the P1 position. Its transmission connection with the ring gear 154 of the planetary gear structure can be achieved in the following ways. In one way, the rotor of the first motor 130 is connected with a motor driving gear 131, and the motor driving gear 131 meshes with the external gear of the ring gear 154. In this setting method, the structural assembly is easier and the transmission efficiency is higher. In another way, the rotor of the first motor 130 is connected to the ring gear 154 and coaxially arranged with the planetary gear mechanism 150. In this setting method, the structure of the whole transmission is more compact.

[0084] The present application also provides a vehicle, which includes a multi-gear hybrid transmission. The specific structure of the multi-gear hybrid transmission refers to the above embodiments. Since this vehicle adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0085] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural transformations made under the inventive concept of the present application by using the content of the specification and drawings of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A multi-gear hybrid transmission, characterized in that, it includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; the flywheel output end of the engine is connected to the first input shaft, the planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier, the rotor of the first motor is drivingly connected to the ring gear, the brake is connected to the sun gear, and the second input shaft is sleeved outside the first input shaft and connected to the planet carrier; the first gear pair is connected between the motor shaft of the second motor and the output shaft, the second gear pair is connected between the second input shaft and the output shaft, wherein the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, and the second driving gear in the second gear pair is sleeved on the second input shaft; the clutch is used to couple or separate the first input shaft and the motor shaft of the second motor; the synchronizer includes a first synchronizer and a second synchronizer, the first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft, and the second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft.

2. The multi-gear hybrid transmission according to claim 1, characterized in that, a motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

3. The multi-gear hybrid transmission according to claim 1, characterized in that, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

4. A multi-gear hybrid transmission, characterized in that, it includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; the flywheel output end of the engine is connected to the first input shaft, the planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier, the rotor of the first motor is drivingly connected to the ring gear, the brake is connected to the sun gear, and the second input shaft is sleeved outside the first input shaft and connected to the planet carrier; the first gear pair is connected between the motor shaft of the second motor and the output shaft, the second gear pair is connected between the second input shaft and the output shaft, wherein the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, and the second driving gear in the second gear pair is sleeved on the second input shaft; the clutch is used to couple or separate the first input shaft and the motor shaft of the second motor; The synchronizer includes a first synchronizer, a second synchronizer, and a third synchronizer. The first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft. The second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft. The third synchronizer is used to selectively connect the second driving gear and the second input shaft.

5. The multi-gear hybrid transmission according to claim 4, wherein, a motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

6. The multi-gear hybrid transmission according to claim 4, wherein, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

7. A multi-gear hybrid transmission, wherein, it includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; the flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planetary carrier. The rotor of the first motor is in transmission connection with the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the planetary carrier; the first gear pair is connected between the motor shaft of the second motor and the output shaft. The second gear pair is connected between the second input shaft and the output shaft. Among them, the first driving gear in the first gear pair is sleeved on the motor shaft of the second motor, and the second driving gear in the second gear pair is fixedly sleeved on the second input shaft; the clutch is used to couple or separate the first input shaft and the motor shaft of the second motor; the synchronizer is used to selectively connect the motor shaft of the second motor and the first driving gear and to selectively connect the motor shaft of the second motor and the second input shaft.

8. The multi-gear hybrid transmission according to claim 7, wherein, a motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

9. The multi-gear hybrid transmission according to claim 7, wherein, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

10. A multi-gear hybrid transmission, wherein, it includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; the flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planetary carrier. The rotor of the first motor is in transmission connection with the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the planetary carrier; The first gear pair is connected between the motor shaft of the second motor and the output shaft, and the second gear pair is connected between the second input shaft and the output shaft. Wherein, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, the first driven gear in the first gear pair is fixedly sleeved on the output shaft, the second driving gear in the second gear pair is fixedly sleeved on the second input shaft, and the second driven gear in the second gear pair is fixedly sleeved on the output shaft; The clutch includes a first clutch and a second clutch. The first clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor, and the second clutch is used to couple or decouple the ring gear and the planet carrier.

11. The multi-speed hybrid transmission according to claim 10, characterized in that, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

12. The multi-speed hybrid transmission according to claim 10, characterized in that, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

13. A multi-speed hybrid transmission, characterized in that, comprising an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The sun gear is coaxially arranged with the first input shaft. The flywheel output end of the engine is connected to the ring gear. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear; The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is sleeved on the first input shaft in an idle manner. The second driven gear in the second gear pair is fixedly sleeved on the output shaft; The clutch is used to couple or decouple the ring gear and the planet carrier; The synchronizer is used to couple or decouple the first driving gear and the first input shaft and to couple or decouple the second driving gear and the first input shaft.

14. The multi-speed hybrid transmission according to claim 13, characterized in that, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

15. The multi-speed hybrid transmission according to claim 13, characterized in that, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

16. A multi-speed hybrid transmission, characterized in that, comprising an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a carrier. The sun gear is coaxially arranged with the first input shaft. The flywheel output end of the engine is connected to the ring gear. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear; The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is fixedly sleeved on the first input shaft. The second driven gear in the second gear pair is fixedly sleeved on the output shaft; The clutch is used to couple or decouple the ring gear and the carrier.

17. The multi-gear hybrid transmission according to claim 16, wherein, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

18. The multi-gear hybrid transmission according to claim 16, wherein, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

19. A vehicle, wherein, The vehicle includes a multi-gear hybrid transmission. The multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and is connected to the carrier; The first gear pair is connected between the motor shaft of the second motor and the output shaft. The second gear pair is connected between the second input shaft and the output shaft. Wherein, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The second driving gear in the second gear pair is coaxially arranged with the second input shaft; The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor; The synchronizer includes a first synchronizer and a second synchronizer. The first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft. The second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft.

20. The vehicle according to claim 19, wherein, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

21. The vehicle according to claim 19, wherein, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

22. A vehicle, wherein, The vehicle includes a multi-gear hybrid transmission, and the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and connected to the planet carrier; The first gear pair is connected between the motor shaft of the second motor and the output shaft, and the second gear pair is connected between the second input shaft and the output shaft. It is characterized in that the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, and the second driving gear in the second gear pair is sleeved on the second input shaft; The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor; The synchronizer includes a first synchronizer, a second synchronizer, and a third synchronizer. The first synchronizer is used to selectively connect the motor shaft of the second motor and the second input shaft. The second synchronizer is used to selectively connect the first driven gear in the first gear pair and the output shaft. The third synchronizer is used to selectively connect the second driving gear and the second input shaft.

23. The vehicle according to claim 22, characterized in that, A motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

24. The vehicle according to claim 22, characterized in that, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

25. A vehicle, characterized in that, The vehicle includes a multi-gear hybrid transmission, and the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, a synchronizer, and a first gear pair and a second gear pair with different speed ratios; The flywheel output end of the engine is connected to the first input shaft. The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The rotor of the first motor is drivingly connected to the ring gear. The brake is connected to the sun gear. The second input shaft is sleeved outside the first input shaft and connected to the planet carrier; The first gear pair is connected between the motor shaft of the second motor and the output shaft, and the second gear pair is connected between the second input shaft and the output shaft. Among them, the first driving gear in the first gear pair is sleeved on the motor shaft of the second motor, and the second driving gear in the second gear pair is fixedly sleeved on the second input shaft; The clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor; The synchronizer is used to selectively connect the motor shaft of the second motor and the first driving gear, and to selectively connect the motor shaft of the second motor and the second input shaft.

26. The vehicle according to claim 25, wherein, a motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

27. The vehicle according to claim 25, wherein, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

28. A vehicle, wherein, the vehicle includes a multi-gear hybrid transmission, and the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, a second input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; the flywheel output end of the engine is connected to the first input shaft, the planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier, the rotor of the first motor is in transmission connection with the ring gear, the brake is connected to the sun gear, and the second input shaft is sleeved outside the first input shaft and is connected to the planet carrier; the first gear pair is connected between the motor shaft of the second motor and the output shaft, the second gear pair is connected between the second input shaft and the output shaft, wherein, the first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor, the first driven gear in the first gear pair is fixedly sleeved on the output shaft, the second driving gear in the second gear pair is fixedly sleeved on the second input shaft, and the second driven gear in the second gear pair is fixedly sleeved on the output shaft; the clutch includes a first clutch and a second clutch, the first clutch is used to couple or decouple the first input shaft and the motor shaft of the second motor, and the second clutch is used to couple or decouple the ring gear and the planet carrier.

29. The vehicle according to claim 28, wherein, a motor driving gear is connected to the rotor of the first motor, and the motor driving gear meshes with the external gear of the ring gear.

30. The vehicle according to claim 28, wherein, the rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

31. A vehicle, wherein, the vehicle includes a multi-gear hybrid transmission, and the multi-gear hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; the planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier, the sun gear is coaxially arranged with the first input shaft, the flywheel output end of the engine is connected to the ring gear, the rotor of the first motor is in transmission connection with the ring gear, and the brake is connected to the sun gear; The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is sleeved on the first input shaft in an idle manner. The second driven gear in the second gear pair is fixedly sleeved on the output shaft; The clutch is used to couple or separate the ring gear and the planet carrier; The synchronizer is used to couple or separate the first driving gear and the first input shaft and to couple or separate the second driving gear and the first input shaft.

32. The motor vehicle according to claim 31, wherein, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

33. The motor vehicle according to claim 31, wherein, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

34. A motor vehicle, wherein, The motor vehicle includes a multi-speed hybrid transmission. The multi-speed hybrid transmission includes an engine, a clutch, a first motor, a second motor, a planetary gear mechanism, a first input shaft, an output shaft, a brake, and a first gear pair and a second gear pair with different speed ratios; The planetary gear mechanism includes a sun gear, a planetary gear set, a ring gear, and a planet carrier. The sun gear is coaxially arranged with the first input shaft. The flywheel output end of the engine is connected to the ring gear. The rotor of the first motor is in transmission connection with the ring gear. The brake is connected to the sun gear; The first driving gear in the first gear pair is coaxially arranged with the motor shaft of the second motor. The first driven gear in the first gear pair is fixedly sleeved on the output shaft. The second driving gear in the second gear pair is fixedly sleeved on the first input shaft. The second driven gear in the second gear pair is fixedly sleeved on the output shaft; The clutch is used to couple or separate the ring gear and the planet carrier.

35. The motor vehicle according to claim 34, wherein, The rotor of the first motor is connected with a motor driving gear, and the motor driving gear meshes with the external gear of the ring gear.

36. The motor vehicle according to claim 34, wherein, The rotor of the first motor is connected to the ring gear and is coaxially arranged with the planetary gear mechanism.

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