WO2019129203A1

WO2019129203A1 - Transmission, power drive system and vehicle

Info

Publication number: WO2019129203A1
Application number: PCT/CN2018/124898
Authority: WO
Inventors: 穆金辉; 王坤城; 白云辉; 王春生; 朱新明
Original assignee: 比亚迪股份有限公司
Priority date: 2017-12-29
Filing date: 2018-12-28
Publication date: 2019-07-04
Also published as: CN109990053B; CN109990053A

Abstract

A transmission, a power drive system, and a vehicle, the transmission comprising a first dual clutch (4), a second dual clutch (5), a first gearwheel set, a second gearwheel set and a third gearwheel set, the first gearwheel set comprises a first gear (6) and a second gear (7), the second gearwheel set comprises a third gear (8) and a fourth gear (9), the third gearwheel set comprises a fifth gear (10) and a sixth gear (11), a first output shaft (42) of the first dual clutch (4) is connected to the first gear (6), a second output shaft (43) of the first dual clutch (4) is connected to the third gear (8) and the fifth gear (10), a first input shaft (52) of the second dual clutch (5) is connected to the sixth gear (11), and a second input shaft (53) of the second dual clutch (5) is connected to the second gear (7) and the fourth gear (9).

Description

Transmission, power drive system and vehicle

Cross-reference to related applications

The present disclosure claims the priority of the Chinese Patent Application No. "201711480500.X" filed on December 29, 2017 by BYD Co., Ltd., entitled "Transmission, Power Drive System, and Vehicle."

Technical field

The present disclosure relates to a transmission, a power drive system, and a vehicle.

Background technique

The transmission is one of the main assemblies of the automotive transmission system. The actual use of the car is very complicated, such as starting, idle parking, low speed or high speed driving, acceleration, deceleration, climbing and reversing, which requires the driving force and speed of the car to vary within a considerable range. At present, the widely used piston engine has a small range of output torque and rotational speed. In order to adapt to the constantly changing driving conditions and at the same time, the engine is operated under favorable conditions (high power, low fuel consumption), and needs to be in the transmission system. Set the transmission in the middle. For motor vehicles driven by new energy vehicles, although the range of motor speed varies, in order to match the high efficiency area of the motor, in some cases it is necessary to provide a transmission in the transmission system. Prior art transmissions are generally complex in construction and costly.

Application content

It is an object of the present disclosure to provide a transmission having a simple structure.

In order to achieve the above object, the present disclosure provides a transmission including a first dual clutch, a second dual clutch, a first gear gear set, a second gear gear set, and a third gear gear set, the first gear position The gear set includes a first gear and a second gear, the second gear gear set includes a third gear and a fourth gear, the third gear gear set includes a fifth gear and a sixth gear, the first double a first output shaft of the clutch is coupled to the first gear, a second output shaft of the first dual clutch is coupled to the third gear and a fifth gear, and a first input shaft of the second dual clutch is coupled to The sixth gear, the second input shaft of the second dual clutch is coupled to the second gear and the fourth gear.

In some embodiments of the present disclosure, the second range gear set is located between the first range gear set and the third range gear set.

In some embodiments of the present disclosure, the first gear meshes with a second gear, the third gear meshes with a fourth gear, and the fifth gear meshes with a sixth gear.

In some embodiments of the present disclosure, the transmission further includes a clutch, the second gear and the fourth gear are coupled by the clutch, and a second input shaft of the second dual clutch and the second gear pass Said clutch connection.

In some embodiments of the present disclosure, the transmission further includes a first transmission gear, a second transmission gear, and a transmission output shaft, an output of the second dual clutch being coupled to the first transmission gear, the second transmission gear Mounted on the transmission output shaft and meshed with the first transmission gear.

In the present disclosure, the combination of the dual clutch and the three-gear gear set makes it possible to obtain a four-speed transmission that is simple in structure and convenient to operate.

The present disclosure also provides a power drive system including an engine, a transmission as described above, and an output, the power shaft of the engine being coupled to an input of the first dual clutch, the output being for transmitting The power output of the transmission is used to drive the vehicle.

In some embodiments of the present disclosure, the system further includes a first electric machine that is powered by the engine.

In some embodiments of the present disclosure, a power shaft of the first electric machine is coupled to the second gear.

In some embodiments of the present disclosure, the system further includes a second electric machine, the output portion further configured to output power from the second electric machine to drive the vehicle.

In some embodiments of the present disclosure, a power shaft of the second electric machine is coaxially coupled to a second output shaft of the first dual clutch.

The present disclosure also provides a vehicle including the power drive system as described above.

Other features and advantages of the present disclosure will be described in detail in the detailed description which follows.

DRAWINGS

The drawings are intended to provide a further understanding of the disclosure, and are in the In the drawing:

1 is a schematic structural view of a transmission according to a first embodiment of the present disclosure;

2 is a schematic structural view of a transmission according to a second embodiment of the present disclosure;

3 is a schematic conceptual diagram of a power drive system in accordance with an embodiment of the present disclosure;

4 is a schematic diagram of a vehicle in accordance with an embodiment of the present disclosure.

Detailed ways

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are not to be construed

According to an aspect of the present disclosure, a transmission is provided, as shown in FIG. 1, the transmission includes a first dual clutch 4, a second dual clutch 5, a first gear gear set, a second gear gear set, and a third gear Bit gear set. The first gear gear set includes a first gear 6 and a second gear 7, the second gear gear set includes a third gear 8 and a fourth gear 9, and the third gear gear set includes a fifth gear 10 and a sixth gear 11 . The first gear 6, the third gear 8, and the fifth gear 10 are disposed on the same axis, and the second gear 7, the fourth gear 9, and the sixth gear 11 are disposed on the other axis. The second gear set is located between the first gear gear set and the third gear gear set.

The first gear 6 and the second gear 7 may be directly engaged or may be meshed with the intermediate gear and connected by the intermediate gear. The third gear 8 and the fourth gear 9 may be directly engaged or may be meshed with the intermediate gear and connected by the intermediate gear. The fifth gear 10 and the sixth gear 11 may be directly engaged or may be meshed with the intermediate gear and connected by the intermediate gear.

The first dual clutch 4 has an input 41, a first output shaft 42 and a second output shaft 43. The power shaft of the first motor 2 is coupled to the input end 41 of the first dual clutch 4, the first output shaft 42 of the first dual clutch 4 is coupled to the first gear 6, the first gear 6 and the first of the first dual clutch 4 The output shaft 42 rotates synchronously. The third gear 8 and the fifth gear 10 are mounted on the second output shaft 43 of the first dual clutch 4, and the third gear 8 and the fifth gear 10 rotate in synchronization with the second output shaft 43. In the first embodiment shown in FIG. 1, the first dual clutch 4 is located on the same side of the first gear gear set, the second gear gear set and the third gear gear set and is adjacent to the first gear position. The gear set is arranged such that the first output shaft 42 of the first dual clutch 4 is sleeved over the second output shaft 43 to make the transmission structure more compact and easy to arrange on the entire vehicle.

The input end 41 of the first dual clutch 4 may be the housing of the first dual clutch 4, the first dual clutch 4 further comprising two driven discs, the first output shaft 42 of the first dual clutch 4 being movable with one of the The disk is connected by a key, and the second output shaft 43 of the first dual clutch 4 can be connected to the other driven disk by a key. Generally, the housing of the first dual clutch 4 and the two driven discs may both be disconnected, i.e., the input end 41 of the first dual clutch 4 is disconnected from both the first output shaft 42 and the second output shaft 43. When it is required to engage one of the driven plates, the housing of the first dual clutch 4 can be controlled to engage with the corresponding driven plate to rotate synchronously, and the driven plate drives the corresponding output shaft to rotate synchronously, that is, the first dual clutch 4 The input 41 is in driving connection with one of the first output shaft 42 and the second output shaft 43 such that the power transmitted from the input 41 can be output through one of the first output shaft 42 and the second output shaft 43.

It should be understood that the specific engagement state of the first dual clutch 4 is affected by the control strategy. For those skilled in the art, the control strategy can be adaptively set according to the actual required transmission mode, so that the input terminal 41 and the two can be The output shafts are all disconnected and the input 41 is switched between a plurality of modes, such as one of the two output shafts.

The second dual clutch 5 has a first input shaft 52, a second input shaft 53, and an output end 51, the first input shaft 52 of the second dual clutch 5 is connected to the sixth gear 11, and the second input of the second dual clutch 5 The shaft 53 is connected to the second gear 7 and the fourth gear 9. In the first embodiment shown in FIG. 1, the second dual clutch 5 is located on the same side of the first gear gear set, the second gear gear set and the third gear gear set and is adjacent to the third gear position. a gear set, that is, the first dual clutch 4 and the second dual clutch 5 are respectively located on both sides of the first gear gear set, the second gear gear set and the third gear gear set, and the second dual clutch 5 An input shaft 52 is sleeved over the second input shaft 53 to make the transmission structure more compact and easy to arrange on the entire vehicle.

The output 51 of the second dual clutch 5 may be the housing of the second dual clutch 5, the second dual clutch 5 further includes two driven discs, and the first input shaft 52 of the second dual clutch 5 may be driven with one of the two The disk is connected by a key, and the second input shaft 53 of the second dual clutch 5 can be connected to the other driven disk by a key. Generally, the housing of the second dual clutch 5 and the two driven discs may both be disconnected, that is, the output end 51 is disconnected from both the first input shaft 52 and the second input shaft 53. When it is required to drive an input shaft to the housing of the second dual clutch 5, the corresponding driven disc can be controlled to engage with the housing, so that the driven disc drives the housing to rotate synchronously, that is, the output end 51 and the first input. One of the shaft 52 and the second input shaft 53 is drivingly coupled such that power transmitted from one of the first input shaft 52 and the second output shaft 53 can be output through the output terminal 51.

It should be understood that the specific engagement state of the second dual clutch 5 is affected by the control strategy. For those skilled in the art, the control strategy can be adaptively set according to the actual required transmission mode, so that the output 51 and the output can be The input shafts are all disconnected and the output 51 is switched between a plurality of modes, such as one of the two input shafts.

In the present disclosure, the combination of two dual clutches and three gear gear sets enables a four-speed transmission that is simple in construction and convenient to operate.

When the first output shaft 42 of the first dual clutch 4 is connected to the input end 41 of the first dual clutch 4, and the first input shaft 52 of the second dual clutch 5 is connected to the output end 51 of the second dual clutch 5, The power input from the input end 41 of the dual clutch 4 sequentially passes through the first output shaft 42 of the first dual clutch 4, the first gear 6, the second gear 7, the fourth gear 9, the third gear 8, and the fifth gear 10, The sixth gear 11, the first input shaft 52 of the second dual clutch 5, the output end 51 of the second dual clutch 5, the first transmission gear 13, and the second transmission gear 14 are transmitted to the transmission output shaft 15.

When the second output shaft 43 of the first dual clutch 4 is connected to the input end 41 of the first dual clutch 4, and the first input shaft 52 of the second dual clutch 5 is connected to the output end 51 of the second dual clutch 5, The power input from the input end 41 of the dual clutch 4 sequentially passes through the second output shaft 43 of the first dual clutch 4, the fifth gear 10, the sixth gear 11, the first input shaft 52 of the second dual clutch 5, and the second double The output end 51 of the clutch 5, the first transfer gear 13, and the second transfer gear 14 are transmitted to the transmission output shaft 15.

When the first output shaft 42 of the first dual clutch 4 is connected to the input end 41 of the first dual clutch 4, and the second input shaft 53 of the second dual clutch 5 is connected to the output end 51 of the second dual clutch 5, The power input from the input end 41 of the dual clutch 4 sequentially passes through the first output shaft 42 of the first dual clutch 4, the first gear 6, the second gear 7, the second input shaft 53 of the second dual clutch 5, and the second double The output end 51 of the clutch 5, the first transfer gear 13, and the second transfer gear 14 are transmitted to the transmission output shaft 15.

When the second output shaft 43 of the first dual clutch 4 is connected to the input end 41 of the first dual clutch 4, and the second input shaft 53 of the second dual clutch 5 is connected to the output end 51 of the second dual clutch 5, The power input from the input end 41 of the dual clutch 4 sequentially passes through the second output shaft 43 of the first dual clutch 4, the third gear 8, the fourth gear 9, the second input shaft 53 of the second dual clutch 5, and the second double The output end 51 of the clutch 5, the first transfer gear 13, and the second transfer gear 14 are transmitted to the transmission output shaft 15.

In the second embodiment shown in FIG. 2, the transmission may further include a first transmission gear 13, a second transmission gear 14, and a transmission output shaft 15, and an output 51 of the second dual clutch 5 is coupled to the first transmission gear 13 The second transfer gear 14 meshes with the first transfer gear 13, and the second transfer gear 14 is mounted on the transmission output shaft 15.

In the second embodiment shown in FIG. 2, the transmission may further include a clutch 12 disposed between the second gear 7 and the fourth gear 9, and the second gear 7 and the fourth gear 9 are coupled by the clutch 12. The fourth gear 9 is mounted on the second input shaft 53 of the second dual clutch 5, and the fourth gear 9 rotates in synchronization with the second input shaft 53 of the second dual clutch 5.

In accordance with another aspect of the present disclosure, a power drive system 100 is provided, as shown in FIG. 3, including an engine 1, a transmission as described above, and an output. The power shaft of the engine 1 is coupled to the input 41 of the first dual clutch 4, and the output is for transmitting power output from the transmission to drive the vehicle.

The output portion may include an output gear 16 and may also include an output gear 16 and a differential 17. The output gear 16 is mounted on the transmission output shaft 15 and rotates in synchronization with the transmission output shaft 15, and the output gear 16 meshes with the main reduction gear 18 of the differential 17. The function of the differential 17 is to roll the left and right wheels at different angular velocities when the vehicle is turning or driving on an uneven road surface to ensure a pure rolling motion between the wheels on both sides and the ground. A differential reduction gear 18 is provided on the differential 17, and the main reduction gear 18 can be arranged, for example, on the housing of the differential 17.

The power drive system 100 may further include a first motor 2 that may generate power under the driving of the engine 1 or may output power as a motor to drive the vehicle.

The first electric machine 2 can be coupled into the power drive system by any suitable means. In the embodiment shown in FIG. 3, the power shaft of the first motor 2 is connected to the second gear 7, that is, the second gear 7 is mounted on the power shaft of the first motor 2, and the second gear 7 and the first motor 2 The power shaft rotates synchronously. In this case, the fourth motor power transmission of the first motor 2 can be realized by controlling the clutch 12, the first dual clutch 4, and the second dual clutch 5.

When the clutch 12 is engaged, the input end 41 of the first dual clutch 4 is not connected to the two output shafts of the first dual clutch 4, and the second input shaft 53 of the second dual clutch 5 and the output end 51 of the second dual clutch 5 When connected, the power of the first motor 2 sequentially passes through the clutch 12, the second input shaft 53 of the second dual clutch 5, the output end 51 of the second dual clutch 5, the first transmission gear 13, the second transmission gear 14, and the transmission output. The shaft 15, the output gear 16, the main reduction gear 18, and the differential 17 are transmitted to the wheels.

When the clutch 12 is engaged, the input end 41 of the first dual clutch 4 is not connected to the two output shafts of the first dual clutch 4, the first input shaft 52 of the second dual clutch 5 and the output end 51 of the second dual clutch 5 When connected, the power of the first motor 2 sequentially passes through the clutch 12, the fourth gear 9, the third gear 8, the fifth gear 10, the sixth gear 11, the first input shaft 52 of the second dual clutch 5, and the second dual clutch. The output 51 of the fifth, the first transfer gear 13, the second transfer gear 14, the transmission output shaft 15, the output gear 16, the reduction gear 18 and the differential 17 are transmitted to the wheels.

When the clutch 12 is open, the input end 41 of the first dual clutch 4 is coupled to both output shafts of the first dual clutch 4, and the first input shaft 52 of the second dual clutch 5 and the output end 51 of the second dual clutch 5 When connected, the power of the first motor 2 sequentially passes through the second gear 7, the first gear 6, the first output shaft 42 of the first dual clutch 4, the input end 41 of the first dual clutch 4, and the first dual clutch 4. Two output shafts 43, a fifth gear 10, a sixth gear 11, a first input shaft 52 of the second dual clutch 5, an output end 51 of the second dual clutch 5, a first transmission gear 13, a second transmission gear 14, a transmission The output shaft 15, the output gear 16, the final reduction gear 18, and the differential 17 are transmitted to the wheels.

When the clutch 12 is opened, the input end 41 of the first dual clutch 4 is connected to both output shafts of the first dual clutch 4, and the second input shaft 53 of the second dual clutch 5 and the output end 51 of the second dual clutch 5 are connected. When connected, the power of the first motor 2 sequentially passes through the second gear 7, the first gear 6, the first output shaft 42 of the first dual clutch 4, the input end 41 of the first dual clutch 4, and the first dual clutch 4. Two output shafts 43, a third gear 8, a fourth gear 9, a second input shaft 53 of the second dual clutch 5, an output end 51 of the second dual clutch 5, a first transmission gear 13, a second transmission gear 14, a transmission The output shaft 15, the output gear 16, the final reduction gear 18, and the differential 17 are transmitted to the wheels.

The power drive system also includes a second electric machine 3 that can function both as an electric motor for driving the vehicle and as a generator for power generation. The second electric machine 3 can be coupled into the power drive system in a variety of ways. In the embodiment shown in FIG. 3, the power shaft of the second electric machine 3 is coaxially connected to the second output shaft 43 of the first dual clutch 4. In this case, the second motor 3 can be selectively driven by the second gear gear or the third gear gear to drive the vehicle by controlling the second dual clutch 5, thereby realizing the second motor 3. Two-speed power drive. The first motor 2 and the second motor 3 may be located on both sides of the transmission, respectively.

In the present disclosure, by cleverly combining two dual clutches with three gear gear sets, it is possible to obtain a transmission that is simple in structure and convenient to operate, and the transmission may be the engine 1 and/or the first motor 2 Four gears are provided, so that the speed and torque of the engine 1 and/or the first motor 2 can be adjusted to some extent, improving the operating efficiency of the engine 1 and/or the first motor 2.

In the present disclosure, the gear shifting of the transmission is achieved by a dual clutch capable of allowing the engagement process of one driven disk to overlap with the disconnection process of the other driven disk when the shifting is switched, thereby avoiding torque transmission. The instantaneous interruption ensures the shifting process and the smooth running of the whole vehicle. Compared to a more complex synchronizer with a mechanical structure, the dual clutch has a large advantage in both smoothness and reliability.

According to some embodiments of the present disclosure, a vehicle 200 is provided. As shown in FIG. 4, the vehicle includes the above-described power drive system 100. Since the present disclosure is provided with the above-described power drive system 100, the vehicle 200 has a simple overall structure. ,low cost.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical idea of the present disclosure. These simple variations are all within the scope of the disclosure.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not be further described in various possible combinations.

In addition, any combination of various embodiments of the present disclosure may be made as long as it does not deviate from the idea of the present disclosure, and should also be regarded as the disclosure of the present disclosure.

Claims

A transmission, comprising: a first dual clutch (4), a second dual clutch (5), a first gear gear set, a second gear gear set, a third gear gear set, the first The gear shifting gear set includes a first gear (6) and a second gear (7), the second gear gear set including a third gear (8) and a fourth gear (9), the third gear gear set A fifth gear (10) and a sixth gear (11) are included, a first output shaft (42) of the first dual clutch (4) is coupled to the first gear (6), the first dual clutch ( a second output shaft (43) of 4) is coupled to the third gear (8) and a fifth gear (10), and a first input shaft (52) of the second dual clutch (5) is coupled to the first A six gear (11), a second input shaft (53) of the second dual clutch (5) is coupled to the second gear (7) and the fourth gear (9).
The transmission of claim 1 wherein said second range gear set is located between said first range gear set and said third range gear set.
The transmission according to claim 1 or 2, wherein said first gear (6) is meshed with a second gear (7), and said third gear (8) is meshed with a fourth gear (9). The fifth gear (10) meshes with the sixth gear (11).
A transmission according to any one of claims 1 to 3, wherein the transmission further includes a clutch (12) through which the second gear (7) and the fourth gear (9) pass (12) Connected, the second input shaft (53) of the second dual clutch (5) is coupled to the second gear (7) via the clutch (12).
A transmission according to any one of claims 1 to 4, wherein the transmission further comprises a first transmission gear (13), a second transmission gear (14) and a transmission output shaft (15), said An output end (51) of the two dual clutch (5) is coupled to the first transfer gear (13), the second transfer gear (14) being mounted on the transmission output shaft (15) and with the first The drive gear (13) is engaged.
A power drive system (100), comprising: an engine (1), a transmission according to any one of claims 1 to 5, and an output portion, an output shaft of the engine (1) and the An input end (41) of the first dual clutch (4) is coupled, and the output portion transmits power output by the transmission to drive the vehicle.
The drive system (100) according to claim 6, characterized in that the system further comprises a first electric machine (2), which is powered by the engine (1).
The drive system (100) according to claim 7, characterized in that the power shaft of the first electric machine (2) is connected to the second gear (7).
A drive system (100) according to any of the claims 6-8, characterized in that the system further comprises a second electric machine (3), the output being further for outputting from the second electric machine ( 3) The power to drive the vehicle.
The drive system (100) according to claim 9, characterized in that the power shaft of the second motor (3) is coaxially connected to the second output shaft (43) of the first dual clutch (4).
A vehicle (200), characterized by comprising a power drive system (100) according to any of claims 6-10.