WO2023124765A1

WO2023124765A1 - Dual clutch transmission

Info

Publication number: WO2023124765A1
Application number: PCT/CN2022/136115
Authority: WO
Inventors: 梅相楠; 赵慧超; 徐占; 赵雪松; 王志明
Original assignee: 中国第一汽车股份有限公司
Priority date: 2021-12-31
Filing date: 2022-12-02
Publication date: 2023-07-06
Also published as: CN114294383A

Abstract

A dual clutch transmission, which comprises a first input shaft (3), a second input shaft (4), a first output shaft (25), a second output shaft (6), a second gear gear set, a third gear gear set, a fourth gear gear set, a fifth gear gear set, a sixth gear gear set, a seventh gear gear set, and an eighth gear gear set; the second gear gear set can form a second gear transmission ratio; the third gear gear set can form a third gear transmission ratio; the fourth gear gear set can form a fourth gear transmission ratio; the fifth gear gear set forms a fifth gear transmission ratio; the sixth gear gear set can form a sixth gear transmission ratio; the seventh gear gear set can form a seventh gear transmission ratio; and the eighth gear gear set can form an eighth gear transmission ratio; the third gear gear set, the fourth gear gear set and the second gear gear set are configured to transmit power and form a first gear transmission ratio; and the third gear gear set and the eighth gear gear set are configured to transmit power and form a ninth gear transmission ratio.

Description

dual clutch transmission

This application claims priority to a Chinese patent application with a filing date of December 31, 2021 and application number 202111657182.6, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of automobiles, for example, to a dual-clutch transmission.

Background technique

Due to its fast shifting, uninterrupted power, low fuel consumption and excellent comfort, dual-clutch transmissions are becoming more and more popular in the market.

Due to the limitation of the layout space of the vehicle, the dual-clutch transmission generally has 6 to 7 gears, which is difficult to meet the demand for more gears.

Contents of the invention

The application provides a dual-clutch transmission capable of providing nine forward gears to meet market demand.

A dual clutch transmission, comprising: a first input shaft; a first clutch connected to the first input shaft; a second input shaft, the first input shaft is coaxially nested in the second input shaft; a second clutch connected to the second input shaft; a first output shaft arranged in parallel with the second input shaft; a second output shaft arranged in parallel with the second input shaft; a second gear set, set to transmit power to the first output shaft via the first input shaft to form a second gear ratio; a third gear set configured to transmit power to the second output shaft via the second input shaft , forming a third-speed transmission ratio; a fourth-speed gear set, configured to transmit power to the second output shaft via the first input shaft to form a fourth-speed transmission ratio; a fifth-speed gear set, configured to transmit power through the The second input shaft is transmitted to the first output shaft to form a fifth-speed transmission ratio; the sixth-speed gear set is configured to transmit power to the first output shaft through the first input shaft to form a sixth-speed transmission ratio; The seventh-speed gear set is configured to transmit power to the second output shaft through the second input shaft to form a seventh-speed transmission ratio; the eighth-speed gear set is configured to transmit power to the second output shaft through the first input shaft. The second output shaft forms an eight-speed transmission ratio; wherein, the third-speed gear set, the fourth-speed gear set and the second-speed gear set are set to transmit power and form a first-speed transmission ratio; The gear set and the eighth gear set are configured to transmit power and form a ninth gear ratio.

Description of drawings

Fig. 1 is a transmission schematic diagram of a dual-clutch transmission provided by an embodiment of the present application.

In the picture:

1-first clutch; 2-second clutch; 3-first input shaft; 4-second input shaft; 5-fifth and seventh gear driving gear; 6-second output shaft; 7-second output gear; 8- Differential device; 9- driven gear for seventh gear; 10- driven gear for third gear; 11- driven gear for transition gear; 12- driven gear shaft for third gear; 13- driven gear for fourth gear; 14- eight gear Driven gear; 15-transition gear driving gear; 16-second gear driving gear; 17-four gear driving gear; 18-six or eight gear driving gear; 19-six gear driven gear; 20-second gear driven gear; 21 -Third reverse gear driving gear; 22-Reverse gear driven gear; 23-Five gear driven gear; 24-First output gear; 25-First output shaft; 26. Main deceleration driven gear.

Detailed ways

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplification of the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

The present embodiment will be described below in conjunction with the accompanying drawings.

With the gradual improvement of the market's demand for vehicle power and economy, under limited space, arranging more gears has become the development direction of dual-clutch transmissions.

Referring to Fig. 1, this embodiment provides a dual-clutch transmission.

In this embodiment, the dual-clutch transmission includes a first input shaft 3, a second input shaft 4, a first output shaft 25, a second output shaft 6, a second gear set, a third gear set, a fourth gear set, and a fifth gear set. gear set, sixth gear set, seventh gear set and eighth gear set.

In one embodiment, the first input shaft 3 is connected with the first clutch 1; the first input shaft 3 is coaxially nested in the second input shaft 4, and the second input shaft 4 is connected with the second clutch 2, also That is, the first clutch 1 and the second clutch 2 are coaxially arranged to form a dual clutch; the first input shaft 3 is connected to the power source through the first clutch 1 ; the second input shaft 4 is connected to the power source through the second clutch 2 .

The first output shaft 25 is arranged in parallel with the second input shaft 4 ; the second output shaft 6 is arranged in parallel with the second input shaft 4 .

The second gear set can transmit power to the first output shaft 25 via the first input shaft 3 to form a second gear transmission ratio; the third gear set can transmit power to the second output shaft 6 via the second input shaft 4 to form a third gear ratio. Gear ratio; the fourth-speed gear set can transmit power to the second output shaft 6 via the first input shaft 3 to form a fourth-speed transmission ratio; the fifth-speed gear set can transmit power to the first output shaft through the second input shaft 4 25, forming a fifth-speed transmission ratio; the sixth-speed gear set can transmit power to the first output shaft 25 through the first input shaft 3, forming a sixth-speed transmission ratio; the seventh-speed gear set can transmit power to the first output shaft 25 through the second input shaft 4 The second output shaft 6 forms a seven-speed transmission ratio; the eight-speed gear set can transmit power to the second output shaft 6 through the first input shaft 3 to form an eight-speed transmission ratio; the third-speed gear set, the fourth-speed gear set and the second-speed gear set The gear set can transmit power to form a first-speed transmission ratio; the third-speed gear set and the eighth-speed gear set can transmit power to form a nine-speed transmission ratio.

The dual-clutch transmission provided in this embodiment can form nine transmission ratios, thereby realizing nine-speed transmission and meeting market demand.

In this embodiment, the dual-clutch transmission also includes a transition gear set, which can transmit power to the second output shaft 6 via the first input shaft 3 to form a transition gear ratio. The third gear set transmits power To the transition gear set, the transition gear set transmits power to the eighth gear set to form a nine gear ratio.

In one embodiment, the transition gear set includes a transition gear driving gear 15 and a transition gear driven gear 11 .

The transition gear driving gear 15 is coaxially fixed on the first input shaft 3; the transition gear driven gear 11 is loosely sleeved on the second output shaft 6, and the transition gear driven gear 11 can be selectively engaged with the second output shaft 6 Alternatively, the transition gear driven gear 11 can be meshed with the transition gear driving gear 15 to form a transition gear ratio.

In one embodiment, the third gear driven gear shaft 12 is vacantly sleeved on the second output shaft 6, the third gear driven gear shaft 12 can be selectively engaged or separated from the second output shaft 6, and the transition gear driven gear 11 is vacantly sleeved. As for the third speed driven gear shaft 12 , the transition speed driven gear 11 can be selectively engaged with or disengaged from the third speed driven gear shaft 12 .

In this embodiment, the third gear set includes the third reverse driving gear 21 and the third driven gear 10 .

The third reverse driving gear 21 is coaxially fixed on the second input shaft 4 ; the third speed driven gear 10 is coaxially fixed on the third speed driven gear shaft 12 .

In this embodiment, the dual-clutch transmission further includes a first reverse gear set, and the first reverse gear set includes a third-speed driven gear 10 and a reverse driven gear 22 .

The reverse gear driven gear 22 is idly sleeved on the first output shaft 25, the reverse gear driven gear 22 can be selectively engaged or separated from the first output shaft 25, the reverse gear driven gear 22 can be connected with the third gear driven gear 10 Meshing transmission creates a first reverse gear ratio.

In this embodiment, the dual clutch transmission further includes a second reverse gear set, and the second reverse gear set includes a third reverse driving gear 21 , a third gear driven gear 10 and a reverse driven gear 22 .

The reverse driven gear 22 is idly sleeved on the first output shaft 25, the third reverse driving gear 21 is meshed with the third gear driven gear 10, and the third gear driven gear 10 is meshed with the reverse driven gear 22 to form the second gear. Reverse gear ratio.

In this embodiment, the dual-clutch transmission also includes a differential device 8, the differential device 8 is provided with a main deceleration driven gear 26, the first output shaft 25 is coaxially fixed with a first output gear 24, the main deceleration The driven gear 26 can mesh with the first output gear 24 to form a first final reduction ratio. A second output gear 7 is coaxially fixed on the second output shaft 6 , and the final reduction driven gear 26 can mesh with the second output gear 7 to form a second final reduction ratio. That is, in this embodiment, two final reduction ratios can be formed, namely the first final reduction ratio and the second final reduction ratio.

In other embodiments, only one final reduction ratio may be set to save costs. For example, only the first final reduction ratio is set: the differential device 8 is provided with the final reduction driven gear 26, and the first output shaft 25 is coaxially fixed with the first output gear 24, and the final reduction and driven gear 26 can be connected with The meshing transmission of the first output gear 24 forms the first final reduction ratio. Or, only the second final reduction ratio is set: the differential device 8 is provided with the final reduction driven gear 26, and the second output shaft 6 is coaxially fixed with the second output gear 7, and the final reduction and driven gear 26 can be connected with The meshing transmission of the second output gear 7 forms the second final reduction ratio.

In this embodiment, the second gear set includes a second driving gear 16 and a second driven gear 20 .

The second-speed driving gear 16 is coaxially fixed on the first input shaft 3; the second-speed driven gear 20 is loosely sleeved on the first output shaft 25, and the second-speed driven gear 20 can be selectively engaged with the first output shaft 25 Or separate, the second gear driving gear 16 can be meshed with the second gear driven gear 20 to form a second gear transmission ratio.

In this embodiment, the first input shaft 3 is provided with coaxially fixed second gear driving gear 16 , fourth gear driving gear 17 , sixth gear and eighth gear driving gear 18 and transition gear driving gear 15 .

The second input shaft 4 is provided with a coaxially fixed third reverse drive gear 21 and fifth and seventh gear drive gears 5 .

The first output shaft 25 is provided with the second gear driven gear 20, the fifth gear driven gear 23, the sixth gear driven gear 19 and the reverse gear driven gear 22 which are empty; the first output shaft 25 is also provided with a coaxially fixed 2nd and 6th gear synchronous device, 5th reverse gear synchronous device and first output gear 24 .

The second output shaft 6 is provided with the third gear driven gear shaft 12, the fourth gear driven gear 13, the seventh gear driven gear 9 and the eighth gear driven gear 14 which are empty sleeves; the second output shaft 6 is also provided with a coaxial fixed The third, seventh and eighth gear synchronizing device, the fourth and eighth gear synchronizing device and the second output gear 7.

The third gear driven gear shaft 12 is provided with a coaxially fixed third gear driven gear 10 and a transition gear synchronizing device; an idle transition gear driven gear 11 is provided. The intermediate gear driven gear 11 is arranged between the third speed driven gear 10 and the intermediate gear synchronizer.

In one embodiment, the second gear driven gear 20 is engaged with the first output shaft 25, and the second gear driving gear 16 on the first input shaft 3 is engaged with the second gear driven gear 20 on the first output shaft 25, forming a second gear. gear set to realize the second gear transmission ratio.

In one embodiment, the third gear driven gear shaft 12 is engaged with the second output shaft 6, the third reverse gear driving gear 21 on the second input shaft 4 is engaged with the third gear driven gear 10 on the second output shaft 6, A third-gear gear set is formed to realize a third-gear transmission ratio.

In one embodiment, the fourth-speed driven gear 13 is engaged with the second output shaft 6, and the fourth-speed driving gear 17 on the first input shaft 3 is meshed with the fourth-speed driven gear 13 on the second output shaft 6 to form a four-speed gear. gear set to achieve a four-speed transmission ratio.

In one embodiment, the driving gear 5 of fifth and seventh gears on the second input shaft 4 is a common gear. The fifth and seventh gears driving gear 5 can mesh with the fifth gear driven gear 23 on the first output shaft 25 to form a fifth gear set to realize the fifth gear ratio; the fifth and seventh gears driving gear 5 can also be connected with the second output shaft 6 The seven-speed driven gear 9 is meshed to form a seven-speed gear set to realize a seven-speed transmission ratio.

In one embodiment, the driving gears 18 of the sixth and eighth gears on the first input shaft 3 are common gears. Sixth and eighth gears driving gear 18 can be meshed with the sixth gear driven gear 19 on the first output shaft 25 to form a sixth gear set to realize the sixth gear transmission ratio; The eight-speed driven gear 14 meshes to form an eight-speed gear set to realize an eight-speed transmission ratio.

In one embodiment, the transition synchronization device is used to make the third-speed driven gear 10 and the fourth-speed driven gear 13 have no relative rotation connection, and the power is sequentially transmitted through the third-speed gear set, the fourth-speed gear set, and the second-speed gear set. Achieve first gear ratio.

In one embodiment, the transition gear driving gear 15 on the first input shaft 3 meshes with the transition gear driven gear 11 on the third gear driven gear shaft 12 to form a transition gear set to realize the transition gear ratio.

In one embodiment, the transition synchronization device is used to make the third-speed driven gear 10 and the transition-speed driven gear 11 have no relative rotation connection, and the power is transmitted through the third-speed gear set, the transition gear set, and the eighth-speed gear set to realize Nine gear ratios.

In one embodiment, the third gear driven gear 10 on the second output shaft 6 is a common gear, and the third gear driven gear 10 and the reverse gear driven gear 22 constitute the first reverse gear set; the third gear driven gear 10 It forms the second reverse gear set with the three reverse gear driving gear 21 and the reverse gear driven gear 22.

In one embodiment, the transition synchronization device is used to make the third gear driven gear 10 and the transition gear driven gear 11 non-rotatably connected, and the first reverse gear is realized through the transition gear set and the first reverse gear set. Compare.

In one embodiment, the second reverse gearset implements the second reverse gear ratio.

In this embodiment, by setting a synchronizing device, the synchronizing device controls the separation and engagement of the idle driven gear and the shaft where it is located. For setting the synchronous device to control the separation and engagement of the driven gear of the empty sleeve and the shaft where it is located, reference may be made to related technologies, and no further introduction will be made here.

In this embodiment, the synchronization device is a synchronizer. The B side and the A side of the second and sixth gear synchronizers are respectively set to control the separation and engagement of the second gear driven gear 20 and the sixth gear driven gear 19 from the first output shaft 25; the D side and the C side of the fifth reverse gear synchronizer are respectively set In order to control the separation and engagement of the fifth gear driven gear 23 and the reverse gear driven gear 22 with the first output shaft 25; the I side and the J side of the third and seventh gear synchronizers are respectively set to control the third gear driven gear 10 and the seventh gear slave gear. The separation and engagement of the driven gear 9 and the second output shaft 6; the F side and the E side of the fourth and eighth gear synchronizers are respectively set to control the separation and engagement of the fourth gear driven gear 13 and the eighth gear driven gear 14 from the second output shaft 6 Engagement: G side and H side of the transition synchronizer are respectively set to control the separation and engagement of the fourth speed driven gear 13 and the transition speed driven gear 11 and the third speed driven gear shaft 12 .

The dual-clutch transmission provided in this embodiment has nine forward gears and two reverse gears. And when any one of the nine forward gears is in gear, the pre-selection of adjacent gears can be realized, which solves the problem of power interruption when switching between individual gears in the dual-clutch transmission structure.

In this embodiment, the dual-clutch transmission has two reverse gears, and compared with the reverse gear structure in the related art, the reverse gear ratio formed by the multiplexed gear set is larger, which can improve the overall speed under reverse gear conditions. The dynamics of the car.

In one embodiment, by setting double reverse gears, it is possible to effectively avoid the failure mode of certain extreme working conditions under reverse gear slopes.

In this embodiment, the transmission lines of the first gear to the ninth gear and the double reverse gear are respectively:

First gear transmission route: second clutch 2→second input shaft 4→third reverse gear driving gear 21→third gear driven gear 10→transition gear synchronizer G→fourth gear driven gear 13→fourth gear driving gear 17→first gear First input shaft 3→second gear driving gear 16→second gear driven gear 20→second gear synchronizer B→first output shaft 25→first output gear 24→differential device 8.

Second gear transmission route: first clutch 1→first input shaft 3→second gear driving gear 16→second gear driven gear 20→second gear synchronizer B→first output shaft 25→first output gear 24→differential device 8.

Transmission route for third gear: second clutch 2→second input shaft 4→third reverse gear driving gear 21→third gear driven gear 10→third gear synchronizer I→second output shaft 6→second output gear 7→differential Device device 8.

Four-speed transmission route: first clutch 1→first input shaft 3→fourth-speed driving gear 17→fourth-speed driven gear 13→fourth-speed synchronizer F→second output shaft 6→second output gear 7→differential device 8.

Five-speed transmission route: second clutch 2→second input shaft 4→fifth and seventh-speed driving gear 5→fifth-speed driven gear 23→fifth-speed synchronizer D→first output shaft 25→first output gear 24→differential Device device 8.

Sixth gear transmission route: first clutch 1→first input shaft 3→sixth and eighth gear driving gear 18→sixth gear driven gear 19→sixth gear synchronizer A→first output shaft 25→first output gear 24→differential Device device 8.

Seventh gear transmission route: second clutch 2→second input shaft 4→fifth and seventh gear driving gear 5→seventh gear driven gear 9→seventh gear synchronizer J→second output shaft 6→second output gear 7→differential Device device 8.

Eight-speed transmission route: first clutch 1→first input shaft 3→sixth and eighth-speed driving gear 18→eighth-speed driven gear 14→eighth-speed synchronizer E→first output shaft 25→first output gear 24→differential Device device 8.

Nine-speed transmission route: second clutch 2→second input shaft 4→third reverse driving gear 21→third-speed driven gear 10→transition gear synchronizer H→transition driven gear 11→transition driving gear 15→second gear One input shaft 3→sixth and eighth gear driving gear 18→eighth gear driven gear 14→eighth gear synchronizer E→second output shaft 6→second output gear 7→differential device 8.

First reverse gear transmission route: first clutch 1→first input shaft 3→transition gear driving gear 15→transition gear driven gear 11→transition gear synchronizer H→third gear driven gear 10→reverse gear driven gear 22 → first output shaft 25 → first output gear 24 → differential gear device 8 .

Second reverse gear transmission route: second clutch 2→second input shaft 4→third reverse gear driving gear 21→third gear driven gear 10→reverse gear driven gear 22→reverse gear synchronizer C→first output shaft 25 → First output gear 24 → Differential device 8 .

The dual-clutch transmission of the present application utilizes the transition synchronizer to realize the transmission ratio of the first gear through the third-speed gear set, the fourth-speed gear set and the second-speed gear set; The eight-speed gear set realizes the nine-speed transmission ratio, and all forward gears can realize sequential upshifts, sequential downshifts and power downshifts without power interruption; and the first and ninth gears reuse different gear sets to make the speed ratio match Easier and more reasonable speed ratio.

The dual-clutch transmission of the present application has two reverse gear ratios, which are respectively the first reverse gear ratio through the first clutch 1 and the second reverse gear ratio through the second clutch 2 to transmit power. On the one hand, the second reverse gear is the reverse gear structure commonly used in dual-clutch transmissions; while using the transition synchronizer, the first reverse gear realized through the third gear set and the first reverse gear set can be obtained through a reasonable matching of the number of teeth. The first reverse gear ratio is larger than the second reverse gear ratio, which makes the second reverse gear of the whole vehicle have better dynamic performance under the same input torque; Under the condition of clutch slipping and grinding, due to the limitation of heat capacity, long-term slipping and grinding may cause the clutch to overheat or even ablate. In view of this working condition, by using the two reverse gears of the present application to transmit power through two clutches respectively, by setting double reverse gears, that is, using the control strategy of alternately slipping the first clutch 1 and the second clutch 2, it can effectively Reduce the temperature rise of the clutch friction plate to avoid overheating.

The dual-clutch transmission of the present application can be combined with a hybrid module to form a hybrid transmission. Exemplarily, a driving motor that is fixedly connected or disconnectable to the dual clutch is added to form a hybrid transmission with a P2 structure. Similarly, a driving motor fixedly connected or disconnectable to one of the output shafts or driven gears can also be added to form a P2.5 hybrid transmission.

Claims

A dual clutch transmission comprising:

first input shaft (3);

a first clutch (1) connected to the first input shaft (3);

a second input shaft (4), the first input shaft (3) is coaxially nested in the second input shaft (4);

a second clutch (2) connected to said second input shaft (4);

The first output shaft (25) is arranged in parallel with the second input shaft (4);

The second output shaft (6) is arranged in parallel with the second input shaft (4) at intervals;

The second-speed gear set is configured to transmit power to the first output shaft (25) via the first input shaft (3) to form a second-speed transmission ratio;

The third-speed gear set is configured to transmit power to the second output shaft (6) via the second input shaft (4) to form a third-speed transmission ratio;

The fourth-speed gear set is configured to transmit power to the second output shaft (6) via the first input shaft (3) to form a fourth-speed transmission ratio;

The fifth-speed gear set is configured to transmit power to the first output shaft (25) via the second input shaft (4) to form a fifth-speed transmission ratio;

The sixth-speed gear set is configured to transmit power to the first output shaft (25) via the first input shaft (3) to form a sixth-speed transmission ratio;

A seven-speed gear set, configured to transmit power to the second output shaft (6) via the second input shaft (4), forming a seven-speed transmission ratio;

An eight-speed gear set, configured to transmit power to the second output shaft (6) via the first input shaft (3), forming an eight-speed transmission ratio;

The third gear set, the fourth gear set and the second gear set are configured to transmit power and form a first gear ratio;

The third gear set and the eighth gear set can transmit power and form a ninth gear ratio.
The dual-clutch transmission according to claim 1, further comprising a transition gear set configured to transmit power to the second output shaft (6) via the first input shaft (3) , forming a transition gear ratio, the third gear set transmits power to the transition gear set, and the transition gear set transmits power to the eighth gear set to form the ninth gear ratio.
The dual clutch transmission of claim 2, wherein said transition gear set comprises:

Transition gear drive gear (15), coaxially fixed on the first input shaft (3);

A transition gear driven gear (11), which is idly sleeved on the second output shaft (6), and the transition gear driven gear (11) is set to be selectively engaged with the second output shaft (6) or separate, the transition gear driven gear (11) is set to mesh with the transition gear driving gear (15) to form the transition gear ratio.
The dual-clutch transmission according to claim 3, wherein a third-speed driven gear shaft (12) is sleeved above the second output shaft (6), and the third-speed driven gear shaft (12) is set to selectively Engaged or separated from the second output shaft (6), the transition gear driven gear (11) is idly sleeved on the third gear driven gear shaft (12), and the transition gear driven gear (11) It is arranged to be selectively engaged or disengaged from the third-speed driven gear shaft (12).
The dual clutch transmission of claim 4, wherein said third speed gear set comprises:

The third reverse drive gear (21) is coaxially fixed on the second input shaft (4);

The third gear driven gear (10) is coaxially fixed on the third gear driven gear shaft (12), and the third reverse gear driving gear (21) is arranged to be connected with the third gear driven gear (10). Meshing transmission forms the third gear ratio.
The dual clutch transmission of claim 5, further comprising a first reverse gear set comprising:

The third gear driven gear (10);

The reverse driven gear (22) is idly sleeved on the first output shaft (25), and the reverse driven gear (22) is set to selectively engage or separate from the first output shaft (25) , the reverse gear driven gear (22) is configured to mesh with the third gear driven gear (10) to form a first reverse gear ratio.
The dual clutch transmission of claim 5, further comprising a second reverse gear set comprising:

The three reverse driving gears (21);

The third gear driven gear (10);

The reverse gear driven gear (22) is idly sleeved on the first output shaft (25), the third reverse gear driving gear (21) is meshed with the third gear driven gear (10), and the third gear The driven gear (10) is meshed with the reverse driven gear (22) to form a second reverse gear ratio.
The dual-clutch transmission according to claim 1, further comprising a differential device (8), on which a final reduction driven gear (26) is arranged, and the first output shaft (25 ) is coaxially fixed with a first output gear (24), and the main deceleration driven gear (26) is set to mesh with the first output gear (24) to form a first main deceleration ratio.
The dual-clutch transmission according to claim 8, wherein a second output gear (7) is coaxially fixed on the second output shaft (6), and the main reduction driven gear is arranged to be connected to the second output shaft (6). The meshing transmission of the output gear (7) forms the second final reduction ratio.
The dual-clutch transmission according to claim 1, further comprising a differential device (8), the differential device (8) is provided with a final reduction and driven gear, and the second output shaft (6) is the same as The shaft is fixed with a second output gear (7), and the main deceleration driven gear is set to engage and drive with the second output gear (7) to form a second main deceleration ratio.
The dual clutch transmission according to any one of claims 1-10, wherein the second gear set comprises:

The second gear driving gear (16) is coaxially fixed on the first input shaft (3);

The second-speed driven gear (20) is idly sleeved on the first output shaft (25), and the second-speed driving gear (16) is set to mesh with the second-speed driven gear (20) to form the Second gear ratio.