CN220556034U

CN220556034U - Transmission, power system and vehicle

Info

Publication number: CN220556034U
Application number: CN202322365621.7U
Authority: CN
Inventors: 赵海滨; 乔颖敏; 吴启帆
Original assignee: Suote Transmission Equipment Co Ltd
Current assignee: Suote Transmission Equipment Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-03-05
Anticipated expiration: 2033-08-31

Abstract

The utility model relates to the field of vehicles, and provides a transmission, a power system and a vehicle. The transmission includes: a housing; the input shaft is arranged on the shell, a first driving gear is rotatably sleeved on the input shaft, and the first driving gear is selectively connected with or separated from the input shaft through a first clutch device; the intermediate shaft is arranged on the shell and is provided with a second driving gear and a first driven gear meshed with the first driving gear; the sun gear shaft is arranged on the shell and is provided with a sun gear and a second driven gear meshed with the second driving gear, and the sun gear shaft is selectively connected with or separated from the input shaft through a second clutch device; the planetary gear, the planet carrier and the gear ring are sleeved on the outer side of the sun gear and connected with the shell, and the planetary gear is arranged between the sun gear and the gear ring and is rotationally connected with the planet carrier; the output shaft is arranged on the shell and is connected with the planet carrier. The transmission has compact structure and smaller size.

Description

Transmission, power system and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a transmission, a power system and a vehicle.

Background

The pure electric vehicle is energy-saving and environment-friendly, is favorable for promoting the development and the utilization of renewable energy sources and meeting the requirement of energy source diversification, and therefore has wider and wider application prospect. The powertrain of an electric vehicle typically includes an electric motor having a motor shaft connected to an input shaft of the transmission and a transmission for changing gear ratios to meet traction demands for different driving conditions.

In the prior art, a parallel shafting layout is generally adopted, namely, a plurality of groups of gear pairs distributed in sequence along the axial direction of an input shaft are used for realizing different gear positions respectively, and the parallel shafting type transmission is large in size and inconvenient to install and layout.

Disclosure of Invention

The utility model provides a transmission, a power system and a vehicle, which are used for solving or improving the defect of larger size of a parallel shaft type transmission in the prior art and realizing the effect of reducing the size of the transmission.

The present utility model provides a transmission comprising:

a housing;

the input shaft is rotatably arranged on the shell, a first driving gear is rotatably sleeved on the input shaft, and the first driving gear is selectively connected with or separated from the input shaft through a first clutch device;

the intermediate shaft is rotatably arranged on the shell and is provided with a second driving gear and a first driven gear meshed with the first driving gear;

the sun gear shaft is rotatably arranged on the shell and is provided with a sun gear and a second driven gear meshed with the second driving gear, and the sun gear shaft is selectively connected with or separated from the input shaft through a second clutch device;

the planetary gear is sleeved on the outer side of the sun gear and connected with the shell, and the planetary gear is arranged between the sun gear and the ring gear and is in rotary connection with the planetary gear;

the output shaft is rotatably arranged on the shell and is connected with the planet carrier.

According to the transmission provided by the utility model, the transmission further comprises a brake and a third clutch device, the gear ring is selectively connected with or disconnected from the shell through the brake, and the output shaft is selectively connected with or disconnected from the sun gear shaft through the third clutch device.

According to the transmission provided by the utility model, the sun gear shaft is connected with the third clutch device through a spline, and the third clutch device is connected with the output shaft through a spline.

According to the transmission provided by the utility model, the brake is connected with the shell through a spline, and the gear ring is connected with the brake through a spline.

According to the transmission provided by the utility model, the transmission further comprises a third driving gear, a third driven gear and a fourth clutch device, wherein the third driving gear is rotatably sleeved on the input shaft, the third driving gear is selectively connected with or separated from the input shaft through the fourth clutch device, and the third driven gear is sleeved on the intermediate shaft and meshed with the third driving gear.

According to the transmission provided by the utility model, the first clutch device and the fourth clutch device share a clutch drum, and the clutch drum is connected with the input shaft.

According to the transmission provided by the utility model, the clutch drum is connected with the input shaft in a welded mode or in a spline mode.

According to the transmission provided by the utility model, the number of the intermediate shafts is at least two, the at least two intermediate shafts are uniformly distributed along the circumferential direction of the input shaft, and each intermediate shaft is provided with the corresponding first driven gear and the corresponding second driving gear.

The utility model also provides a power system comprising a motor and the transmission, wherein a motor shaft of the motor is connected with the input shaft.

The utility model also provides a vehicle comprising a transmission as described above or a powertrain as described above.

The transmission provided by the utility model can be connected with the motor through the input shaft so that the power of the motor can be transmitted to the input shaft. The power of the input shaft can be transmitted to the output shaft through the first clutch device, the first driving gear, the first driven gear, the second driving gear, the second driven gear, the sun gear shaft, the sun gear, the planet gears and the planet carrier, or transmitted to the output shaft through the second clutch device, the sun gear shaft, the sun gear, the planet gears and the planet carrier.

The transmission provided by the utility model realizes a speed change effect by combining the parallel shaft gear mechanism and the planetary gear mechanism, wherein the planetary gear mechanism has the effects of compact structure and large reduction ratio, on one hand, the transmission can be compact in structure and the size of the transmission can be reduced, and on the other hand, the parallel shaft gear mechanism adopts a smaller transmission ratio, so that the size of the parallel shaft gear mechanism is reduced, and the size of the transmission can also be reduced.

The power system and the vehicle provided by the utility model simultaneously comprise all the advantages of the transmission due to the transmission provided by the utility model.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a power system provided in some embodiments of the utility model.

Reference numerals:

1. a housing; 2. an input shaft; 3. a first drive gear; 4. a first clutch device; 5. an intermediate shaft; 6. a second drive gear; 7. a first driven gear; 8. a sun gear shaft; 9. a sun gear; 10. a second driven gear; 11. a second clutch device; 12. a planet wheel; 13. a planet carrier; 14. a gear ring; 15. an output shaft; 16. a brake; 17. a third clutch device; 18. a third drive gear; 19. a third driven gear; 20. a fourth clutch device; 21. and a motor.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The transmission provided in the embodiment of the utility model is described below with reference to fig. 1.

Specifically, the transmission includes a housing 1, an input shaft 2, an intermediate shaft 5, a sun gear shaft 8, an output shaft 15, a first driving gear 3, a first driven gear 7, a second driving gear 6, a second driven gear 10, planetary gears 12, a sun gear 9, a carrier 13, a ring gear 14, a first clutch device 4, and a second clutch device 11.

The input shaft 2 is rotatably disposed in the housing 1, for example, one end of the input shaft 2 is disposed in the housing 1, and the other end of the input shaft 2 extends out of the housing 1 and is used for connection with the motor 21. The input shaft 2 is rotatably mounted with a first drive gear 3, i.e. the first drive gear 3 is rotatable relative to the input shaft 2. The first driving gear 3 is selectively connected to or disconnected from the input shaft 2 by a first clutch device 4, i.e. the first clutch device 4 is used to connect or disconnect the first driving gear 3 from the input shaft 2.

The intermediate shaft 5 is rotatably provided to the housing 1, and the intermediate shaft 5 is provided with a first driven gear 7 and a second driving gear 6. Wherein the first driven gear 7 is in mesh with the first driving gear 3 on the input shaft 2. Alternatively, the first driven gear 7 and the second driving gear 6 are both keyed to the intermediate shaft 5. Specifically, the intermediate shaft 5 is provided on one side of the input shaft 2, and the intermediate shaft 5 is provided in parallel with the input shaft 2.

The sun gear shaft 8 is rotatably provided in the housing 1, and the sun gear shaft 8 is provided with a sun gear 9 and a second driven gear 10. Wherein the second driven gear 10 meshes with the second driving gear 6 on the intermediate shaft 5. The second driven gear 10 or the sun gear 9 is keyed or provided as an integral structure with the sun gear shaft 8. The sun gear shaft 8 is selectively connected to or disconnected from the input shaft 2 by a second clutch device 11, i.e. the second clutch device 11 is used to connect or disconnect the sun gear shaft 8 from the input shaft 2. The sun gear shaft 8 is arranged coaxially with the input shaft 2.

The gear ring 14 is sleeved on the outer side of the sun gear 9 and is connected with the shell 1, and a space for installing the planet gears 12 is arranged between the gear ring 14 and the sun gear 9. The planet wheel 12 is arranged between the sun wheel 9 and the gear ring 14, the planet wheel 12 is meshed with the sun wheel 9 and the gear ring 14 respectively, and the planet wheel 12 is rotationally connected with the planet carrier 13.

An output shaft 15 is rotatably provided to the housing 1, and the output shaft 15 is connected to the carrier 13.

The transmission provided in the embodiment of the present utility model can be connected to the motor 21 through the input shaft 2 so that the power of the motor 21 can be transmitted to the input shaft 2. The power of the input shaft 2 can be transmitted to the output shaft 15 via the first clutch device 4, the first driving gear 3, the first driven gear 7, the second driving gear 6, the second driven gear 10, the sun gear shaft 8, the sun gear 9, the planet gears 12 and the planet carrier 13, or to the output shaft 15 via the second clutch device 11, the sun gear shaft 8, the sun gear 9, the planet gears 12 and the planet carrier 13.

With such arrangement, the transmission provided in the embodiment of the utility model realizes a speed change effect by combining the parallel shaft gear mechanism and the planetary gear mechanism, wherein the planetary gear mechanism has the effects of compact structure and large reduction ratio, on one hand, the transmission can be compact in structure, the size of the transmission can be reduced, and on the other hand, the parallel shaft gear mechanism can adopt a smaller transmission ratio, so that the size of the parallel shaft gear mechanism can be reduced, and the size of the transmission can also be reduced. The parallel shaft gear mechanism comprises an input shaft 2, an intermediate shaft and gears between the input shaft and the intermediate shaft, and the planetary gear mechanism comprises a sun gear shaft 8, a sun gear 9, a planetary gear 12, a gear ring 14 and a planetary carrier 13.

In some embodiments provided by the present utility model, the transmission further comprises a brake 16 and a third clutch device 17. The ring gear 14 is selectively connected to or disconnected from the housing 1 by a brake 16, i.e., the brake 16 is used to connect or disconnect the ring gear 14 to or from the housing 1. The output shaft 15 is selectively connected to or disconnected from the sun gear shaft 8 by a third clutch 17, i.e. the third clutch 17 is used to connect or disconnect the output shaft 15 from the sun gear shaft 8.

In the present embodiment, the brake 16 and the third clutch 17 are combined in two states, one of which, the brake 16 connects the ring gear 14 and the housing 1, and the third clutch 17 disconnects the output shaft 15 from the sun gear shaft 8, so that the power of the sun gear shaft 8 is transmitted to the output shaft 15 through the sun gear 9, the planet gears 12 and the carrier 13. Second, when the brake 16 disengages the ring gear 14 from the housing 1 and the third clutch 17 connects the output shaft 15 to the sun gear shaft 8, the power of the sun gear shaft 8 is transmitted to the output shaft 15 through the third clutch 17.

The number of the transmission ratios of the planetary gear mechanisms is increased, and the transmission ratios of the parallel shaft gear mechanisms are matched, so that the transmission has more transmission ratio numbers to respond to different driving requirements more quickly and accurately, and the acceleration performance, the power output and the energy consumption economy of the vehicle are improved.

In some embodiments provided by the present utility model, the transmission further comprises a third driving gear 18, a third driven gear 19 and a fourth clutch device 20. The third driving gear 18 is rotatably sleeved on the input shaft 2, that is, the third driving gear 18 can rotate relative to the input shaft 2. The third driving gear 18 is selectively connected to or disconnected from the input shaft 2 by a fourth clutch device 20, i.e. the fourth clutch device 20 is used to connect or disconnect the third driving gear 18 from the input shaft 2. The third driven gear 19 is sleeved on the intermediate shaft 5 and meshed with the third middle east gear.

In the present embodiment, the first clutch device 4, the second clutch device 11 and the fourth clutch device 20 have three state combinations. First, the first clutch device 4 connects the first driving gear 3 with the input shaft 2, the second clutch device 11 disconnects the input shaft 2 from the sun gear shaft 8, the fourth clutch device 20 disconnects the third driving gear 18 from the input shaft 2, and the power of the input shaft 2 is transmitted to the sun gear shaft 8 through the first driving gear 3, the first driven gear 7, the intermediate shaft 5, the second driving gear 6 and the second driven gear 10.

Second, the first clutch device 4 disengages the first driving gear 3 from the input shaft 2, the second clutch device 11 disengages the input shaft 2 from the sun gear shaft 8, the fourth clutch device 20 connects the third driving gear 18 with the input shaft 2, and the power of the input shaft 2 is transmitted to the sun gear shaft 8 through the third driving gear 18, the third driven gear 19, the intermediate shaft 5, the second driving gear 6 and the second driven gear 10.

Third, the first clutch device 4 disconnects the first driving gear 3 from the input shaft 2, the second clutch device 11 connects the input shaft 2 and the sun gear shaft 8, the fourth clutch device 20 disconnects the third driving gear 18 from the input shaft 2, and the power of the input shaft 2 is directly transmitted to the sun gear shaft 8 through the second clutch device 11.

Therefore, the number of the transmission ratios of the parallel shaft gear mechanisms is increased, and the transmission ratio of the planetary gear mechanisms is matched, so that the transmission has more transmission ratio numbers to respond to different driving requirements more quickly and accurately, and the acceleration performance, the power output and the energy consumption economy of the vehicle are improved.

Of course, the technical means in the above-described embodiments can be combined, for example, the transmission provided in the embodiment of the present utility model includes the housing 1, the input shaft 2, the intermediate shaft 5, the sun gear shaft 8, the output shaft 15, the first driving gear 3, the first driven gear 7, the second driving gear 6, the second driven gear 10, the third driving gear 18, the third driven gear 19, the planetary gear 12, the sun gear 9, the carrier 13, the ring gear 14, the first clutch device 4, the second clutch device 11, the third clutch device 17, the fourth clutch device 20, and the brake 16.

The input shaft 2 is rotatably disposed in the housing 1, for example, one end of the input shaft 2 is disposed in the housing 1, and the other end of the input shaft 2 extends out of the housing 1 and is used for connection with the motor 21. The input shaft 2 is rotatably sleeved with a first driving gear 3 and a third driving gear 18. The first driving gear 3 is selectively connected to or disconnected from the input shaft 2 by a first clutch device 4. The third driving gear 18 is selectively connected to or disconnected from the input shaft 2 by a fourth clutch device 20.

The intermediate shaft 5 is rotatably provided to the housing 1, and the intermediate shaft 5 is provided with a first driven gear 7, a second driving gear 6, and a third driven gear 19. Wherein the first driven gear 7 is in mesh with the first driving gear 3 on the input shaft 2. The third driven gear 19 meshes with a third driving gear 18 on the input shaft 2. The intermediate shaft 5 is provided on one side of the input shaft 2, and the intermediate shaft 5 is parallel to the input shaft 2.

The sun gear shaft 8 is rotatably provided in the housing 1, and the sun gear shaft 8 is provided with a sun gear 9 and a second driven gear 10. Wherein the second driven gear 10 meshes with the second driving gear 6 on the intermediate shaft 5. The sun gear shaft 8 is selectively connected to or disconnected from the input shaft 2 by a second clutch device 11, i.e. the second clutch device 11 is used to connect or disconnect the sun gear shaft 8 from the input shaft 2. The sun gear shaft 8 is arranged coaxially with the input shaft 2.

The gear ring 14 is sleeved on the outer side of the sun gear 9, and the gear ring 14 is selectively connected with or disconnected from the housing 1 through a brake 16. The ring gear 14 has a distance from the sun gear 9 for the installation of the planet gears 12. The planet wheel 12 is arranged between the sun wheel 9 and the gear ring 14, the planet wheel 12 is meshed with the sun wheel 9 and the gear ring 14 respectively, and the planet wheel 12 is rotationally connected with the planet carrier 13.

An output shaft 15 is rotatably provided to the housing 1, and the output shaft 15 is connected to the carrier 13. The output shaft 15 is selectively connected to and disconnected from the sun gear shaft 8 by a third clutch 17. It should be noted that the number of teeth of any driving gear is smaller than the number of teeth of the driven gear engaged with the driving gear. The first clutch device 4, the second clutch device 11, the third clutch device 17 and the fourth clutch device 20 may be clutches.

In the present embodiment, the first clutch device 4, the second clutch device 11, the third clutch device 17, the fourth clutch device 20 and the brake 16 are combined in six states, so that six transmission ratios can be realized, that is, three transmission ratios of the parallel shaft gear mechanism and two transmission ratios of the planetary gear mechanism are arranged and combined, specifically as follows:

in first gear, the first clutch 4 is closed, the second clutch 11 is open, the third clutch 17 is open, the fourth clutch 20 is open and the brake 16 is closed. The power of the input shaft 2 is transmitted to the output shaft 15 through the first clutch device 4, the first driving gear 3, the first driven gear 7, the intermediate shaft 5, the second driving gear 6, the second driven gear 10, the sun gear shaft 8, the sun gear 9, the planet gears 12 and the planet carrier 13 in order.

In reverse gear, the state of each clutch device and brake 16 is the same as that in first gear, and reverse gear can be realized by reversing motor 21.

In second gear, the first clutch 4 is open, the second clutch 11 is open, the third clutch 17 is open, the fourth clutch 20 is closed and the brake 16 is closed. The power of the input shaft 2 is transmitted to the output shaft 15 via the fourth clutch device 20, the third driving gear 18, the third driven gear 19, the intermediate shaft 5, the second driving gear 6, the second driven gear 10, the sun gear shaft 8, the sun gear 9, the planet gears 12 and the planet carrier 13 in this order.

In third gear, the first clutch 4 is open, the second clutch 11 is closed, the third clutch 17 is open, the fourth clutch 20 is open and the brake 16 is closed. The power of the input shaft 2 is transmitted to the output shaft 15 via the second clutch 11, the sun gear shaft 8, the sun gear 9, the planet gears 12 and the planet carrier 13 in this order.

In fourth gear, the first clutch 4 is closed, the second clutch 11 is open, the third clutch 17 is closed, the fourth clutch 20 is open and the brake 16 is open. The power of the input shaft 2 is transmitted to the output shaft 15 through the first clutch device 4, the first driving gear 3, the first driven gear 7, the intermediate shaft 5, the second driving gear 6, the second driven gear 10, the sun gear shaft 8 and the third clutch device 17 in sequence.

In fifth gear, the first clutch 4 is open, the second clutch 11 is open, the third clutch 17 is closed, the fourth clutch 20 is closed and the brake 16 is open. The power of the input shaft 2 is transmitted to the output shaft 15 through the fourth clutch device 20, the third driving gear 18, the third driven gear 19, the intermediate shaft 5, the second driving gear 6, the second driven gear 10, the sun gear shaft 8, and the third clutch device 17 in this order.

In sixth gear, the first clutch 4 is open, the second clutch 11 is closed, the third clutch 17 is closed, the fourth clutch 20 is open and the brake 16 is open. The power of the input shaft 2 is transmitted to the output shaft 15 through the second clutch 11, the sun gear shaft 8 and the third clutch 17 in this order.

In some embodiments provided by the present utility model, the sun gear shaft 8 is splined to the third clutch 17, and the third clutch 17 is splined to the output shaft 15. Specifically, one side of the third clutch 17 is connected to the sun gear shaft 8 by a spline, and the other side of the third clutch 17 is connected to the output shaft 15 by a spline. The third clutch device 17 and the sun gear shaft 8 and the third clutch device 17 and the output shaft 15 have high connection strength, and can bear large load.

In some embodiments provided by the present utility model, the brake 16 is splined to the housing 1 and the ring gear 14 is splined to the brake 16. Specifically, the rotating portion of the brake 16, for example, the friction plate is connected to the ring gear 14 by a spline, and the braking portion of the brake 16 is connected to the housing 1 by a spline. By this arrangement, the brake 16 and the ring gear 14 and the brake 16 and the housing 1 have high connection strength, and can bear large loads.

In some embodiments provided by the present utility model, the first clutch device 4 and the fourth clutch device 20 share a clutch drum, which is connected with the input shaft 2. Specifically, the friction plate of the first clutch device 4 is connected to the first driving gear 3, the friction plate of the fourth clutch device 20 is connected to the third driving gear 18, and either one of the friction plate of the first clutch device 4 and the friction plate of the second clutch device 11 is selectively engaged with or disengaged from the clutch drum. By sharing the clutch drums by the first clutch device 4 and the second clutch device 11 in this manner, the number of clutch drums can be reduced, the structure of the transmission can be simplified, and the weight of the transmission can be reduced.

Alternatively, the clutch drum is welded to the input shaft 2 or splined.

In some embodiments provided by the present utility model, the number of intermediate shafts 5 is set to at least two, at least two intermediate shafts 5 are uniformly distributed along the circumferential direction of the input shaft 2, and each intermediate shaft 5 is provided with a corresponding first driven gear 7, a corresponding second driving gear 6, and a corresponding third driven gear 19.

When the input shaft 2 transmits power to the sun gear shaft 8 through the at least two intermediate shafts 5, the stress of the sun gear shaft 8 and the input shaft 2 is relatively balanced, bending moment born by the input shaft 2 and the sun gear shaft 8 can be reduced, and in addition, the power is split through the at least two intermediate shafts 5, so that the width of a gear between the intermediate shafts 5 and the input shaft 2 and the width of a gear between the intermediate shafts 5 and the sun gear shaft 8 can be properly reduced, and the size of the transmission in the axial direction of the input shaft 2 can be shortened.

The embodiment of the utility model also provides a power system.

Specifically, the power system includes the motor 21 and the transmission as described above, and the motor shaft of the motor 21 is connected with the input shaft 2.

The powertrain includes the transmission and naturally includes all of the advantages of the transmission and will not be described in detail herein.

The embodiment of the utility model also provides a vehicle.

Specifically, the vehicle includes a transmission as described above or a powertrain as described above.

The vehicle incorporates a transmission or powertrain, and naturally also incorporates corresponding advantages, which will not be described in detail herein.

Vehicles according to the present utility model include, but are not limited to, commercial vehicles such as trucks, trailers, and the like.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A transmission, comprising:

a housing (1);

the input shaft (2) is rotatably arranged on the shell (1), a first driving gear (3) is rotatably sleeved on the input shaft (2), and the first driving gear (3) is selectively connected with or separated from the input shaft (2) through a first clutch device (4);

an intermediate shaft (5) rotatably arranged on the housing (1), wherein the intermediate shaft (5) is provided with a second driving gear (6) and a first driven gear (7) meshed with the first driving gear (3);

a sun gear shaft (8) rotatably arranged on the shell (1), wherein the sun gear shaft (8) is provided with a sun gear (9) and a second driven gear (10) meshed with the second driving gear (6), and the sun gear shaft (8) is selectively connected with or separated from the input shaft (2) through a second clutch device (11);

the planetary gear (12), the planet carrier (13) and the gear ring (14), wherein the gear ring (14) is sleeved on the outer side of the sun gear (9) and is connected with the shell (1), and the planet gear (12) is arranged between the sun gear (9) and the gear ring (14) and is rotationally connected with the planet carrier (13);

an output shaft (15) rotatably provided to the housing (1), the output shaft (15) being connected to the carrier (13).

2. Transmission according to claim 1, further comprising a brake (16) and a third clutch device (17), the ring gear (14) being selectively connectable to or disconnectable from the housing (1) by means of the brake (16), the output shaft (15) being selectively connectable to or disconnectable from the sun gear shaft (8) by means of the third clutch device (17).

3. Transmission according to claim 2, wherein the sun gear shaft (8) is splined to the third clutch device (17), the third clutch device (17) being splined to the output shaft (15).

4. A transmission according to claim 2, wherein the brake (16) is splined to the housing (1) and the ring gear (14) is splined to the brake (16).

5. The transmission according to any one of claims 1-4, further comprising a third driving gear (18), a third driven gear (19) and a fourth clutch device (20), wherein the third driving gear (18) is rotatably sleeved on the input shaft (2), the third driving gear (18) is selectively connected with or disconnected from the input shaft (2) through the fourth clutch device (20), and the third driven gear (19) is sleeved on the intermediate shaft (5) and meshed with the third driving gear (18).

6. Transmission according to claim 5, characterized in that the first clutch device (4) and the fourth clutch device (20) share a clutch drum, which is connected with the input shaft (2).

7. Transmission according to claim 6, characterized in that the clutch drum is welded or splined to the input shaft (2).

8. A transmission according to any one of claims 1-4, characterized in that the number of intermediate shafts (5) is arranged in at least two, at least two of the intermediate shafts (5) being evenly distributed in the circumferential direction of the input shaft (2), each intermediate shaft (5) being provided with a respective first driven gear (7) and a respective second driving gear (6).

9. A power system, characterized by comprising an electric motor (21) and a transmission according to any of claims 1-8, the motor shaft of the electric motor (21) being connected to the input shaft (2).

10. A vehicle comprising a transmission according to any one of claims 1-8 or a powertrain according to claim 9.