WO2022135012A1

WO2022135012A1 - Eight-gear dual-clutch transmission

Info

Publication number: WO2022135012A1
Application number: PCT/CN2021/133014
Authority: WO
Inventors: 唐立中; 赵雪松; 赵慧超; 赵成福; 王志明; 梅相楠; 毛泽贤
Original assignee: 中国第一汽车股份有限公司
Priority date: 2020-12-25
Filing date: 2021-11-25
Publication date: 2022-06-30
Also published as: CN112709789A

Abstract

An eight-gear dual-clutch transmission, comprising: a first input shaft (10), a second input shaft (11), an intermediate shaft (12), a reverse gear shaft (13), an output shaft (14), a first gear set, a second gear set, a third gear set, a fourth gear set, a fifth and seventh gear synchronization device (80), a sixth gear set, a seventh gear set, an eighth gear set, and a reverse gear set. The output shaft (14) is transmissionally connected to the intermediate shaft (12), the first input shaft (10) and the second input shaft (11) have a coaxially nested structure, and the intermediate shaft (12) and the first input shaft (10) are arranged in parallel and at an interval; and the first gear set, second gear set, third gear set, fourth gear set, fifth and seventh gear synchronization device (80), sixth gear set, seventh gear set, and eighth gear set can form eight different gear ratios, respectively.

Description

Eight-speed dual-clutch transmission

This application claims the priority of the Chinese Patent Application No. 202011564102.8 filed with the China Patent Office on December 25, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of automobile technology, for example, to an eight-speed 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.

The number of gears of the transverse dual-clutch transmission is generally relatively small, with only seven gears at most, which is difficult to meet the market demand for more gears.

SUMMARY OF THE INVENTION

The present application provides an eight-speed dual-clutch transmission capable of providing eight gears to meet market demands.

An eight-speed dual-clutch transmission includes a first input shaft, a second input shaft, an intermediate shaft, a reverse gear shaft, an output shaft, a first-speed gear set, a second-speed gear set, a third-speed gear set, a fourth-speed gear set, and a fifth-speed gear set. A seventh-speed synchronizing device, a sixth-speed gear set, a seventh-speed gear set, an eighth-speed gear set and a reverse gear set, the output shaft is drivingly connected with the intermediate shaft, the first input shaft is connected with the second input shaft It is a coaxial nesting structure, and the intermediate shaft and the first input shaft are arranged in parallel and spaced apart;

The first-speed gear set is configured to transmit power to the output shaft through the first input shaft and the intermediate shaft in sequence to form a first-speed transmission;

The second-speed gear set is configured to transmit power to the output shaft through the second input shaft and the intermediate shaft in sequence to form a second-speed transmission;

The third-gear gear set is configured to transmit power to the output shaft through the first input shaft and the intermediate shaft in sequence to form a third-gear transmission;

The fourth-speed gear set is configured to transmit power to the output shaft through the first input shaft and the intermediate shaft in sequence to form a fourth-speed transmission;

The fifth-seventh gear synchronizing device is configured to transmit power to the output shaft via the first input shaft to form a fifth-gear transmission;

The sixth-speed gear set is configured to transmit power to the output shaft through the second input shaft and the intermediate shaft in sequence to form a sixth-speed transmission;

The seventh-speed gear set is configured to transmit power to the output shaft through the first input shaft and the intermediate shaft in sequence, so as to form a seventh-speed transmission;

The eighth-speed gear set is configured to transmit power to the output shaft sequentially via the first input shaft and the reverse gear shaft to form an eighth-speed transmission;

The reverse gear set is configured to transmit power to the output shaft through the second input shaft and the intermediate shaft in sequence to form a reverse gear transmission.

In one embodiment, the first-speed gear set includes an eighth-speed driving gear and a first-speed driven gear, the one-eighth-speed driving gear is coaxially fixed on the first input shaft, and the first-speed driven gear The gear is coaxially sleeved on the intermediate shaft;

The second-speed gear set includes a second-reverse driving gear and a second-speed driven gear, the second-reverse driving gear is coaxially fixed on the second input shaft, and the second-speed driven gear is coaxially empty. on the intermediate shaft;

The third-speed gear set includes a third-speed driving gear and a third-speed driven gear, the third-speed driving gear is coaxially fixed on the first input shaft, and the third-speed driven gear is coaxially sleeved on the first input shaft. on the intermediate shaft;

The fourth-speed gear set includes a fourth-speed driving gear and a fourth-speed driven gear, the fourth-speed driving gear is coaxially fixed on the second input shaft, and the fourth-speed driven gear is coaxially sleeved on the second input shaft. on the intermediate shaft;

The fifth-seventh gear synchronizing device is coaxially fixed on the first input shaft;

The sixth-speed gear set includes a sixth-speed driving gear and a sixth-speed driven gear, the sixth-speed driving gear is coaxially fixed on the second input shaft, and the sixth-speed driven gear is coaxially sleeved on the second input shaft. on the intermediate shaft;

The seventh-speed gear set includes a seventh-speed driving gear and a seventh-speed driven gear, the seventh-speed driving gear is coaxially fixed on the first input shaft, and the seventh-speed driven gear is coaxially fixed on the intermediate shaft;

The eighth-speed gear set includes the first-eighth-speed driving gear and the eighth-speed driven gear, and the eighth-speed driven gear is coaxially fixed on the reverse shaft;

The first and eighth gears are double gears.

In one embodiment, the reverse gear set includes the second reverse drive gear and a reverse driven gear, and the reverse driven gear is coaxially idling on the intermediate shaft. .

In one embodiment, the eight-speed dual-clutch transmission further includes a dual-mass flywheel, and the first input shaft is connected to the dual-mass flywheel through a first clutch and a torsional shock absorber.

In one embodiment, the second input shaft is connected to the dual-mass flywheel through a second clutch and the torsional damper;

The first clutch and the second clutch are coaxially arranged to form a double clutch.

In one embodiment, a driven reduction gear is arranged on the output shaft, a driving reduction gear is coaxially fixed on the intermediate shaft, and the driven reduction gear can mesh with the driving reduction gear.

In one embodiment, the fifth-seventh gear synchronizing device includes a fifth-gear synchronizer and a seventh-gear synchronizer, and the fifth-gear synchronizer is configured to control the separation and combination of the output shaft and the first input shaft, the A seventh-speed synchronizer is configured to control the separation and coupling of the seventh-speed driving gear and the first input shaft.

In one embodiment, the eight-speed dual-clutch transmission further includes a first- and third-speed synchronizing device, the first- and third-speed synchronizing device is coaxially fixed on the intermediate shaft, and the first- and third-speed synchronizing device includes a first-speed synchronizer and A third-speed synchronizer, the first-speed synchronizer is configured to control the separation and combination of the first-speed driven gear and the intermediate shaft; the third-speed synchronizer is configured to control the third-speed driven gear and the Separation and bonding of intermediate shafts.

In one embodiment, the eight-speed dual-clutch transmission further includes a second reverse gear synchronizing device, the second reverse gear synchronizing device is coaxially fixed on the intermediate shaft, and the second reverse gear synchronizing device includes a second gear synchronizer and A reverse gear synchronizer, the second gear synchronizer is arranged to control the separation and combination of the second gear driven gear and the intermediate shaft, and the reverse gear synchronizer is arranged to control the reverse gear driven gear and the intermediate shaft Separation and bonding of intermediate shafts.

In one embodiment, the eight-speed dual-clutch transmission further includes a fourth- and sixth-speed synchronization device, the fourth- and sixth-speed synchronization device is coaxially fixed on the intermediate shaft, and the fourth- and sixth-speed synchronization device includes a fourth-speed synchronizer and a A sixth-speed synchronizer, the fourth-speed synchronizer is configured to control the separation and combination of the fourth-speed driven gear and the intermediate shaft, and the sixth-speed synchronizer is configured to control the sixth-speed driven gear to connect with the intermediate shaft. Separation and bonding of intermediate shafts.

Description of drawings

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

In the picture:

100. Dual-mass flywheel; 101. Torsional shock absorber;

10, the first input shaft; 11, the second input shaft; 12, the intermediate shaft; 13, the reverse gear shaft; 14, the output shaft; 15, the first clutch; 16, the second clutch;

21. Sixth gear driven gear; 22, Fourth gear driven gear; 23, Reverse gear driven gear; 24, Second gear driven gear; 25, Third gear driven gear;

26. First-speed driven gear; 27. Seven-speed driven gear; 28. Drive reduction gear; 29. Parking gear; 30. Driven reduction gear;

31. Seventh-speed driving gear; 32. One-eighth-speed driving gear; 33. Eighth-speed driven gear; 34. Second reverse idler gear; 35. Reverse gear device;

36, the first reverse gear idler; 37, the third gear driving gear; 38, the second reverse gear driving gear; 39, the fourth gear driving gear; 40, the sixth gear driving gear;

50, 4th and 6th gear synchronizer; 51, 6th gear synchronizer; 52, 4th gear synchronizer; 60, second reverse gear synchronizer; 61, reverse gear synchronizer; 62, 2nd gear synchronizer; device; 71, the third gear synchronizer; 72, the first gear synchronizer; 80, the fifth and seventh gear synchronization device; 81, the seventh gear synchronizer; 82, the fifth gear synchronizer;

90, eight-speed synchronizer; 200, transmission front casing; 210, transmission middle plate; 220, transmission rear casing; 230, transmission rear cover.

Detailed ways

The technical solutions of the present application will be described below with reference to the accompanying drawings and through specific embodiments. The specific embodiments described herein are merely used to explain the present application. For the convenience of description, only the parts related to the present application are shown in the drawings.

In the description of this application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. refer to the orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore It should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

In the description of this application, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection; it may be a mechanical connection, It can also be an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the meanings of the above terms in the present application can be understood according to the situation.

Referring to FIG. 1 , this embodiment provides an eight-speed dual-clutch transmission. The eight-speed dual-clutch transmission includes a first input shaft 10 , a second input shaft 11 , an intermediate shaft 12 , a reverse gear shaft 13 , an output shaft 14 , a first gear Gear set, second-speed gear set, third-speed gear set, fourth-speed gear set, fifth- and seventh-speed synchronizing device 80, sixth-speed gear set, seventh-speed gear set, eight-speed gear set and reverse gear set, output shaft 14 and intermediate The shaft 12 is in a transmission connection, the first input shaft 10 and the second input shaft 11 are coaxial nested structures, and the intermediate shaft 12 and the first input shaft 10 are arranged in parallel and spaced apart.

The first gear set can transmit the power to the output shaft 14 through the first input shaft 10 and the intermediate shaft 12 in turn to form a first gear transmission; the second gear set can transmit the power to the output through the second input shaft 11 and the intermediate shaft 12 in sequence. The shaft 14 forms the second-speed transmission; the third-speed gear set can transmit the power to the output shaft 14 through the first input shaft 10 and the intermediate shaft 12 in turn to form the third-speed transmission; the fourth-speed gear set can pass the power through the first input shaft in turn. 10. The intermediate shaft 12 is transmitted to the output shaft 14 to form a fourth gear transmission; the fifth and seventh gear synchronizing device 80 can transmit power to the output shaft 14 via the first input shaft 10 to form a fifth gear transmission; It is transmitted to the output shaft 14 via the second input shaft 11 and the intermediate shaft 12 to form a six-speed transmission; the seventh-speed gear set can sequentially transmit power to the output shaft 14 through the first input shaft 10 and the intermediate shaft 12 to form a seventh-speed transmission; The eighth gear set can transmit power to the output shaft 14 through the first input shaft 10 and the reverse gear shaft 13 in sequence to form an eighth gear transmission; thus, eight gears are formed to meet market requirements. The reverse gear set can transmit the power to the output shaft 14 via the second input shaft 11 and the intermediate shaft 12 in sequence to form a reverse gear transmission.

The first-speed gear set includes an eighth-speed driving gear 32 and a first-speed driven gear 26 . The first-eighth-speed driving gear 32 is coaxially fixed on the first input shaft 10 , and the first-speed driven gear 26 is coaxially sleeved on the intermediate shaft. 12 on.

The second-speed gear set includes a second-reverse driving gear 38 and a second-speed driven gear 24 , the second-reverse driving gear 38 is coaxially fixed on the second input shaft 11 , and the second-speed driven gear 24 is coaxially sleeved on the intermediate shaft 12 on.

The third-speed gear set includes a third-speed driving gear 37 and a third-speed driven gear 25 . The third-speed driving gear 37 is coaxially fixed on the first input shaft 10 , and the third-speed driven gear 25 is coaxially hollowed on the intermediate shaft 12 .

The fourth-speed gear set includes a fourth-speed driving gear 39 and a fourth-speed driven gear 22 , the fourth-speed driving gear 39 is coaxially fixed on the second input shaft 11 , and the fourth-speed driven gear 22 is coaxially idling on the intermediate shaft 12 .

The fifth-seventh gear synchronizing device 80 is coaxially fixed on the first input shaft 10 .

The sixth-speed gear set includes a sixth-speed driving gear 40 and a sixth-speed driven gear 21 , the sixth-speed driving gear 40 is coaxially fixed on the second input shaft 11 , and the sixth-speed driven gear 21 is coaxially vacant on the intermediate shaft 12 .

The seventh-speed gear set includes a seventh-speed driving gear 31 and a seventh-speed driven gear 27 . The seventh-speed driving gear 31 is coaxially fixed on the first input shaft 10 , and the seventh-speed driven gear 27 is coaxially fixed on the intermediate shaft 12 .

The eighth-speed gear set includes an eighth-speed driving gear 32 and an eighth-speed driven gear 33 , and the eighth-speed driven gear 33 is coaxially fixed on the reverse gear shaft 13 .

The driving gear 32 of the first and eighth gears is a double gear, so that the number of gears can be increased without increasing the axial length.

The reverse gear set includes a second reverse drive gear 38 and a reverse driven gear 23 , and the reverse driven gear 23 is coaxially idling on the intermediate shaft 12 .

In this embodiment, the first input shaft 10 is coaxially fixed with the first and eighth gear driving gear 32, the third gear driving gear 37, and the fifth and seventh gear synchronizing device 80, and the first input shaft 10 is vacantly sleeved with the seventh gear driving gear 31, The first and eighth-speed driving gears 32 are double gears.

The first input shaft 10 and the second input shaft 11 are coaxially nested, and the second input shaft 11 is coaxially fixed with a second reverse gear 38 , a fourth gear 39 and a sixth gear 40 .

The intermediate shaft 12 and the first input shaft 10 are arranged in parallel and spaced apart. The intermediate shaft 12 is provided with a coaxial empty sleeve of a first-speed driven gear 26 , a second-speed driven gear 24 , a third-speed driven gear 25 , and a fourth-speed driven gear. 22. The sixth gear driven gear 21 and the reverse driven gear 23, and the intermediate shaft 12 is provided with coaxially fixed first and third gear synchronizing device 70, second reverse gear synchronizing device 60, fourth and sixth gear synchronizing device 50, seventh gear slave Drive gear 27 , drive reduction gear 28 and parking gear 29 .

The reverse gear shaft 13 is provided with a coaxial idle reverse gear device 35 and an eighth-speed driven gear 33 .

The output shaft 14 is in driving connection with the intermediate shaft 12 .

When the eighth-speed dual-clutch transmission provided in this embodiment is in operation, the first-eighth-speed driving gear 32 meshes with the first-speed driven gear 26 to transmit power from the first input shaft 10 to the output shaft 14 via the intermediate shaft 12 to form a first-gear Transmission; the second reverse gear driving gear 38 meshes with the second gear driven gear 24, and transmits the power from the second input shaft 11 to the intermediate shaft 12, and then transmits it to the output shaft 14 via the intermediate shaft 12, forming a second gear transmission; the third gear is active The gear 37 meshes with the third-speed driven gear 25, and transmits the power from the first input shaft 10 to the intermediate shaft 12, and then transmits it to the output shaft 14 through the intermediate shaft 12 to form a third-speed transmission; the fourth-speed driving gear 39 and the fourth-speed slave gear The moving gear 22 is meshed to transmit the power from the first input shaft 10 to the intermediate shaft 12, and then to the output shaft 14 via the intermediate shaft 12 to form a fourth gear transmission; the fifth and seventh gear synchronizing device 80 transmits the power to the output shaft 14, forming a Fifth gear transmission; sixth gear driving gear 40 meshes with sixth gear driven gear 21 to transmit power from second input shaft 11 to intermediate shaft 12, and then to output shaft 14 via intermediate shaft 12 to form sixth gear transmission; seventh gear The driving gear 31 meshes with the seventh-speed driven gear 27 to transmit the power from the first input shaft 10 to the intermediate shaft 12, and then to the output shaft 14 via the intermediate shaft 12 to form a seventh-speed transmission; The gear driven gear 33 meshes for transmission to form an eight-speed transmission; in this way, eight different transmission ratios are formed, thereby realizing eight-speed transmission and meeting market demands.

In this embodiment, the eight-speed dual-clutch transmission further includes a dual-mass flywheel 100 , and the first input shaft 10 is connected to the dual-mass flywheel 100 through a first clutch 15 and a torsional shock absorber 101 .

In this embodiment, the second input shaft 11 is connected to the dual-mass flywheel 100 through the second clutch 16 and the torsional damper 101 .

The first clutch 15 and the second clutch 16 are arranged coaxially to form a double clutch.

In this embodiment, the output shaft 14 is provided with a driven reduction gear 30 , and the driven reduction gear 30 can mesh with the driving reduction gear 28 .

In this embodiment, the fifth-seventh gear synchronizing device 80 includes a fifth-gear synchronizer 82 and a seventh-gear synchronizer 81. The fifth-gear synchronizer 82 is configured to control the separation and combination of the output shaft 14 and the first input shaft 10, and the seventh-gear synchronizer 81 is arranged to control the separation and coupling of the seventh-speed driving gear 31 and the first input shaft 10 .

In this embodiment, the first and third gear synchronization device 70 includes a first gear synchronizer 72 and a third gear synchronizer 71. The first gear synchronizer 72 is configured to control the separation and combination of the first gear driven gear 26 and the intermediate shaft 12; the third gear synchronization The device 71 is arranged to control the disengagement and engagement of the third-speed driven gear 25 and the intermediate shaft 12 .

In this embodiment, the second reverse gear synchronizing device 60 includes a second gear synchronizer 62 and a reverse gear synchronizer 61. The second gear synchronizer 62 is configured to control the separation and combination of the second gear driven gear 24 and the intermediate shaft 12, and the reverse gear synchronizes The device 61 is arranged to control the disengagement and engagement of the reverse driven gear 23 and the countershaft 12 .

In this embodiment, the fourth and sixth gear synchronization device 50 includes a fourth gear synchronizer 52 and a sixth gear synchronizer 51. The fourth gear synchronizer 52 is configured to control the separation and combination of the fourth gear driven gear 22 and the intermediate shaft 12, and the sixth gear synchronizes The device 51 is arranged to control the disengagement and engagement of the sixth-speed driven gear 21 and the intermediate shaft 12 .

In this embodiment, the eight-speed dual-clutch transmission further includes an eight-speed synchronizer 90 . The eight-speed synchronizer 90 is sleeved on the reverse gear shaft 13 and is configured to control the separation and operation of the eighth-speed driven gear 33 and the reverse gear device 35 . combine.

In this embodiment, the eight-speed dual-clutch transmission also includes a transmission front housing 200 and a transmission rear housing 220. The transmission front housing 200 and the transmission rear housing 220 are buckled to form an accommodating space, and the transmission gears of the eight-speed dual-clutch transmission are located in the housing. in the setting space. The eight-speed dual-clutch transmission also includes a transmission middle plate 210. The transmission middle plate 210 is placed in the accommodating space and is arranged opposite to the transmission front casing 200. One end of the reverse gear shaft 13 is arranged on the transmission front casing 200, and the other end is arranged on the transmission front casing 200. on the transmission midplate 210. The eight-speed dual-clutch transmission also includes a transmission rear cover 230 . The transmission rear cover 230 is located at the output end of the eight-speed dual-clutch transmission, and the output shaft 14 passes through the transmission rear cover 230 and extends out of the accommodating space.

In this embodiment, the reverse gear device 35 is provided with a coaxially fixed first idler reverse gear 36 , a second idler reverse gear 34 , and an eighth-speed synchronizer 90 .

The transmission route from the first gear to the eighth gear of the eight-speed dual-clutch transmission provided in this embodiment is:

First gear transmission route: first clutch 15 → first input shaft 10 → first and eighth gear driving gear 32 → first gear driven gear 26 → first third gear synchronizing device 70 → intermediate shaft 12 → driving reduction gear 28 → driven reduction gear 30→Output shaft 14.

Second gear transmission route: second clutch 16 → second input shaft 11 → second reverse gear driving gear 38 → second gear driven gear 24 → second reverse gear synchronization device 60 → intermediate shaft 12 → driving reduction gear 28 → driven reduction gear 30→Output shaft 14.

The third gear transmission route: the first clutch 15 → the first input shaft 10 → the third gear driving gear 37 → the third gear driven gear 25 → the first and third gear synchronization device 70 → the intermediate shaft 12 → the driving reduction gear 28 → the driven reduction gear 30 →Output shaft 14.

Fourth gear transmission route: second clutch 16→second input shaft 11→fourth gear driving gear 39→fourth gear driven gear 22→fourth and sixth gear synchronization device 50→intermediate shaft 12→drive reduction gear 28→driven reduction gear 30 →Output shaft 14.

Fifth gear transmission route: first clutch 15→first input shaft 10→fifth and seventh gear synchronization device 80→output shaft 14.

Six-speed transmission route: second clutch 16 → second input shaft 11 → sixth-speed driving gear 40 → sixth-speed driven gear 21 → fourth-six-speed synchronization device 50 → intermediate shaft 12 → driving reduction gear 28 → driven reduction gear 30 →Output shaft 14.

Seventh gear transmission route: first clutch 15 → first input shaft 10 → fifth and seventh gear synchronizing device 80 → seventh gear driving gear 31 → seventh gear driven gear 27 → intermediate shaft 12 → driving reduction gear 28 → driven reduction gear 30 →Output shaft 14.

Eighth-speed transmission route: first clutch 15→first input shaft 10→first-eighth-speed driving gear 32→eighth-speed driven gear 33→eighth-speed synchronization device 90→first reverse idler gear 36→reverse driven gear 23 →Second reverse gear synchronizing device 60 →intermediate shaft 12 →driving reduction gear 28 →driven reduction gear 30 →output shaft 14 .

Reverse gear transmission route: second input shaft 11→second reverse gear driving gear 38→reverse gear shaft 13→second reverse gear idler 34→first reverse gear idler 36→reverse driven gear 23→intermediate shaft 12→ The driving reduction gear 28 → the driven reduction gear 30 → the output shaft 14 .

Claims

An eight-speed dual-clutch transmission, comprising a first input shaft (10), a second input shaft (11), an intermediate shaft (12), a reverse gear shaft (13), an output shaft (14), a first gear set, a second gear Gear set for gears, gear set for third gear, gear set for fourth gear, synchronization device for fifth and seventh gears (80), gear set for sixth gear, gear set for seventh gear, gear set for eighth gear and reverse gear set, said output shaft (14) Drive connection with the intermediate shaft (12), the first input shaft (10) and the second input shaft (11) are coaxial nested structures, the intermediate shaft (12) and the first input shaft (12) The shafts (10) are arranged in parallel and spaced apart;

The first-speed gear set is configured to transmit power to the output shaft (14) via the first input shaft (10) and the intermediate shaft (12) in sequence to form a first-speed transmission;

The second-speed gear set is configured to transmit power to the output shaft (14) via the second input shaft (11) and the intermediate shaft (12) in sequence to form a second-speed transmission;

The third-speed gear set is configured to transmit power to the output shaft (14) via the first input shaft (10) and the intermediate shaft (12) in sequence to form a third-speed transmission;

The fourth-speed gear set is configured to transmit power to the output shaft (14) via the first input shaft (10) and the intermediate shaft (12) in sequence to form a fourth-speed transmission;

The fifth-seventh gear synchronizing device (80) is configured to transmit power to the output shaft (14) via the first input shaft (10) to form a fifth-gear transmission;

The sixth-speed gear set is configured to transmit power to the output shaft (14) via the second input shaft (11) and the intermediate shaft (12) in sequence to form a sixth-speed transmission;

The seventh-speed gear set is configured to transmit power to the output shaft (14) via the first input shaft (10) and the intermediate shaft (12) in sequence to form a seventh-speed transmission;

The eighth gear set is configured to transmit power to the output shaft (14) via the first input shaft (10) and the reverse gear shaft (13) in sequence to form an eighth gear transmission;

The reverse gear set is configured to transmit power to the output shaft (14) via the second input shaft (11) and the intermediate shaft (12) in sequence to form a reverse gear transmission.
The eight-speed dual-clutch transmission according to claim 1, wherein the first-speed gear set comprises an eighth-speed driving gear (32) and a first-speed driven gear (26), and the one-eighth-speed driving gear (32) coaxially fixed on the first input shaft (10), and the first-speed driven gear (26) is coaxially sleeved on the intermediate shaft (12);

The second-speed gear set includes a second-reverse driving gear (38) and a second-speed driven gear (24), and the second-reverse driving gear (38) is coaxially fixed on the second input shaft (11) , the second-speed driven gear (24) is coaxially and vacantly sleeved on the intermediate shaft (12);

The third-speed gear set includes a third-speed driving gear (37) and a third-speed driven gear (25), and the third-speed driving gear (37) is coaxially fixed on the first input shaft (10), so The third-speed driven gear (25) is coaxially hollowed on the intermediate shaft (12);

The fourth-speed gear set includes a fourth-speed driving gear (39) and a fourth-speed driven gear (22), and the fourth-speed driving gear (39) is coaxially fixed on the second input shaft (11), so The fourth-speed driven gear (22) is coaxially idly sleeved on the intermediate shaft (12);

The fifth-seventh gear synchronization device (80) is coaxially fixed on the first input shaft (10);

The sixth-speed gear set includes a sixth-speed driving gear (40) and a sixth-speed driven gear (21), and the sixth-speed driving gear (40) is coaxially fixed on the second input shaft (11), so The sixth-speed driven gear (21) is coaxially hollowed on the intermediate shaft (12);

The seventh-speed gear set includes a seventh-speed driving gear (31) and a seventh-speed driven gear (27), and the seventh-speed driving gear (31) is coaxially fixed on the first input shaft (10), so The seventh-speed driven gear (27) is coaxially fixed on the intermediate shaft (12);

The eighth-speed gear set includes the first-eighth-speed driving gear (32) and the eighth-speed driven gear (33), and the eighth-speed driven gear (33) is coaxially fixed on the reverse gear shaft (13) superior;

The first and eighth-speed driving gears (32) are double gears.
The eight-speed dual-clutch transmission according to claim 2, wherein the reverse gear set includes the second reverse drive gear (38) and a reverse driven gear (23), the reverse driven gear ( 23) A coaxial empty sleeve is placed on the intermediate shaft (12).
The eight-speed dual-clutch transmission according to claim 3, further comprising a dual-mass flywheel (100), the first input shaft (10) being connected to the dual-mass flywheel (10) through a first clutch (15) and a torsional damper (101) Mass flywheel (100) connection.
The eight-speed dual-clutch transmission according to claim 4, wherein the second input shaft (11) communicates with the dual-mass flywheel (100) through a second clutch (16) and the torsional damper (101) connect;

The first clutch (15) and the second clutch (16) are coaxially arranged to form a double clutch.
The eight-speed dual-clutch transmission according to claim 2, wherein a driven reduction gear (30) is arranged on the output shaft (14), and a driving reduction gear (30) is coaxially fixed on the intermediate shaft (12). 28), the driven reduction gear (30) meshes with the driving reduction gear (28).
The eight-speed dual-clutch transmission according to claim 2, wherein the fifth-speed and seventh-speed synchronizer (80) comprises a fifth-speed synchronizer (82) and a seventh-speed synchronizer (81), and the fifth-speed synchronizer (82) ) is arranged to control the separation and combination of the output shaft (14) and the first input shaft (10), and the seventh-speed synchronizer (81) is arranged to control the seventh-speed driving gear (31) to connect with the Separation and coupling of the first input shaft (10).
The eight-speed dual-clutch transmission according to claim 2, further comprising a third-speed synchronizing device (70), the first and third-speed synchronizing device (70) being coaxially fixed on the intermediate shaft (12), and the one The third gear synchronizer (70) includes a first gear synchronizer (72) and a third gear synchronizer (71), the first gear synchronizer (72) is configured to control the first gear driven gear (26) and the intermediate gear The separation and coupling of the shaft (12); the third-speed synchronizer (71) is arranged to control the separation and coupling of the third-speed driven gear (25) and the intermediate shaft (12).
The eight-speed dual-clutch transmission according to claim 3, further comprising a second reverse gear synchronization device (60), the second reverse gear synchronization device (60) is coaxially fixed on the intermediate shaft (12), and the two reverse gear synchronization device (60) is coaxially fixed on the intermediate shaft (12). The reverse gear synchronizer (60) comprises a second gear synchronizer (62) and a reverse gear synchronizer (61), the second gear synchronizer (62) being arranged to control the second gear driven gear (24) and the intermediate gear The separation and coupling of the shaft (12), the reverse synchronizer (61) is arranged to control the separation and coupling of the reverse driven gear (23) and the intermediate shaft (12).
The eight-speed dual-clutch transmission according to claim 2, further comprising a fourth- and sixth-speed synchronization device (50), the fourth and sixth-speed synchronization device (50) being coaxially fixed on the intermediate shaft (12), and the fourth and sixth-speed synchronization devices (50) are coaxially fixed on the intermediate shaft (12). A sixth-speed synchronizing device (50) includes a fourth-speed synchronizer (52) and a sixth-speed synchronizer (51), the fourth-speed synchronizer (52) being configured to control the fourth-speed driven gear (22) and the intermediate Separation and coupling of the shaft (12), the sixth-speed synchronizer (51) is arranged to control the separation and coupling of the sixth-speed driven gear (21) and the intermediate shaft (12).