CN105465295A - Nine-speed dual-clutch transmission - Google Patents

Abstract

The invention belongs to a vehicle transmission, in particular to a multi-speed dual-clutch transmission. Specifically, it is a nine-speed dual-clutch transmission box, including: an engine, a clutch module and a gearbox module. The present invention adopts six pairs of forward gears and one pair of reverse gears to realize nine forward gears and three reverse gears, and the gear mechanism has a high degree of reusability; it adopts a two-shaft arrangement similar to that of a manual gearbox , The process inheritance is good; there is no power interruption when the transmission gear is switched, and the power shift of all gears is realized; an overdrive gear is realized, which is conducive to improving the fuel economy of the vehicle.

Description

Nine-speed dual-clutch transmission

technical field

The invention belongs to a vehicle transmission, in particular to a multi-speed dual-clutch transmission.

Background technique

With the development of today's vehicle industry, energy saving and emission reduction have become the main direction of design. Vehicles have increasingly strict requirements on the design of transmissions. Dual-clutch automatic transmissions with high transmission efficiency and simple structure have gradually become a development trend. Dual-clutch transmission combines the high efficiency of manual transmission and the advantages of automatic transmission. It uses two sets of clutches to replace the low-efficiency hydraulic torque converter. Through the alternate work of the two sets of clutches, it achieves the gapless power shifting effect. As a result, it not only makes the driving of the vehicle easier, but also effectively improves the comfort, power and safety of the vehicle. Compared with the traditional 6-speed or 7-speed dual-clutch gearbox for passenger cars, the vehicle dual-clutch gearbox requires more gears and a larger transmission ratio range. In order to obtain the compact size of the dual-clutch gearbox, the vehicle dual-clutch gearbox usually adopts a three-degree-of-freedom or four-degree-of-freedom fixed-axis gear mechanism design, which reduces the complexity of the gear mechanism and realizes more stalls. But there is still potential to be tapped in terms of lightweight and compactness.

Contents of the invention

The object of the present invention is to provide a 9-speed dual-clutch transmission with higher reusability of gear mechanism, lighter weight and more compact structure.

The technical solution of the present invention is: a nine-speed dual-clutch transmission, an engine, a clutch module, and a gearbox module; the engine is connected to the gearbox module through the clutch module.

The clutch module includes: a first clutch and a corresponding first input shaft, a second clutch and a corresponding second input shaft; the first input shaft is coaxially sleeved outside the second input shaft.

The gearbox module includes: a gearbox output shaft arranged coaxially with the second input shaft; an intermediate shaft arranged parallel to the gearbox output shaft, and an intermediate shaft sleeve shaft coaxially sleeved outside the intermediate shaft.

The first input shaft is sequentially connected to the first gear and the third gear along its power transmission direction; the second input shaft is connected to the fifth gear; the gearbox output shaft is sequentially connected to the third synchronizer and the ninth gear along its power transmission direction and the fourth synchronizer; the fifth synchronizer, the twelfth gear and the fourteenth gear are sequentially connected to the intermediate shaft along its power transmission direction; the sixth gear and the eighth gear are sequentially connected to the intermediate shaft sleeve shaft along its power transmission direction and sixth synchronizer.

The seventh gear, the eleventh gear and the thirteenth gear are vacantly sleeved on the gearbox output shaft in turn; the second gear and the fourth gear are idly sleeved on the intermediate shaft in turn; the tenth gear is idly sleeved on the intermediate shaft sleeve shaft.

When the third synchronizer meshes to the left, it synchronizes the output shaft of the gearbox with the second input shaft, and when it meshes with the right, it synchronizes the output shaft of the gearbox with the seventh gear; when the fourth synchronizer meshes with the left, it synchronizes the output shaft of the gearbox with the eleventh gear. Gears, when meshing to the right, synchronize the transmission output shaft and the third gear; when the fifth synchronizer is meshing to the left, synchronize the intermediate shaft and the second gear, and when meshing to the right, synchronize the intermediate shaft and the fourth gear; the sixth synchronizer is to the left Synchronize the intermediate shaft sleeve shaft and the tenth gear when meshing, and synchronize the intermediate shaft sleeve shaft and the intermediate shaft when meshing to the right.

The first gear meshes with the second gear, the third gear meshes with the fourth gear, the fifth gear meshes with the sixth gear, the seventh gear meshes with the eighth gear through the idler gear, the ninth gear meshes with the tenth gear, and the tenth gear meshes with the tenth gear. The first gear meshes with the twelfth gear, and the thirteenth gear meshes with the fourteenth gear.

Beneficial effects: the present invention adopts six pairs of forward gear pairs and one pair of reverse gear pairs, realizes nine forward gears and three reverse gears, and the gear mechanism has a high degree of reusability; it adopts a gear mechanism similar to that of a vehicle manual transmission The two-shaft system arrangement has good process inheritance; there is no power interruption when the transmission gear is switched, and the power shift of all gears is realized; an overdrive gear is realized, which is conducive to improving the fuel economy of the vehicle.

Description of drawings

Fig. 1 is transmission diagram of the present invention;

Fig. 2 is a state power flow diagram of the first gear of the present invention;

Fig. 3 is the state power flow figure of 2 gears of the present invention;

Fig. 4 is a power flow diagram of the third gear state of the present invention;

Fig. 5 is the state power flow figure of 4 gears of the present invention;

Fig. 6 is the power flow diagram of the 5th gear state of the present invention;

Fig. 7 is the power flow chart of 6 gears state of the present invention;

Fig. 8 is the power flow diagram of the 7th gear state of the present invention;

Fig. 9 is 8 gears power flow diagrams of the present invention;

Fig. 10 is 9 gears of power flow diagrams of the present invention;

Fig. 11 is the power flow diagram of the present invention in reverse 1st gear state;

Fig. 12 is a state power flow diagram of the reverse 2nd gear of the present invention;

Fig. 13 is a power flow diagram of the present invention in reverse 3rd gear state.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1 , the present embodiment provides a nine-speed dual-clutch transmission, including: an engine 101, a clutch module 102 and a gearbox module; the engine 101 is connected to the gearbox module through the clutch module 102.

The clutch module 102 includes: a first clutch 202 and a corresponding first input shaft 302 , a second clutch 201 and a corresponding second input shaft 301 , wherein the first input shaft 302 is coaxially sleeved outside the second input shaft 301 .

The gearbox module 103 includes: a gearbox output shaft 303 coaxially arranged with the second input shaft 301; an intermediate shaft 304 arranged in parallel with the gearbox output shaft 303, and an intermediate shaft sleeve shaft 305 coaxially sleeved outside the intermediate shaft 304 . The first input shaft 302 is sequentially connected to the first gear 401 and the third gear 403 along its power transmission direction; the second input shaft 301 is connected to the fifth gear 405; the transmission output shaft 303 is sequentially connected to the third synchronizer along its power transmission direction 203, the ninth gear 409 and the fourth synchronizer 204; the intermediate shaft 304 is sequentially connected with the fifth synchronizer 205, the twelfth gear 412, and the fourteenth gear 414 along its power transmission direction; The power transmission direction connects the sixth gear 406 , the eighth gear 408 and the sixth synchronizer 206 in sequence. The seventh gear 407, the eleventh gear 411 and the thirteenth gear 413 are successively idling on the transmission output shaft 303; the second gear 402 and the fourth gear 404 are successively idling on the intermediate shaft 304; the tenth gear 410 is idling Set on the intermediate shaft sleeve shaft 305. When the third synchronizer 203 meshes to the left, the output shaft 303 of the gearbox and the second input shaft 301 are synchronized, and when the mesh is engaged to the right, the output shaft 303 of the gearbox is synchronized with the seventh gear 407; when the fourth synchronizer 204 meshes to the left, the gearbox is synchronized The output shaft 303 and the eleventh gear 411, when meshing to the right, synchronize the output shaft 303 and the third gear 403 of the gearbox; when the fifth synchronizer 205 meshes to the left, synchronize the intermediate shaft 304 and the second gear 402, and synchronize when meshing to the right The intermediate shaft 304 and the fourth gear 404; the sixth synchronizer 206 synchronizes the intermediate shaft sleeve shaft 305 and the tenth gear 410 when meshing to the left, and synchronizes the intermediate shaft sleeve shaft 305 and the intermediate shaft 304 when meshing to the right. The first gear 401 meshes with the second gear 402, the third gear 403 meshes with the fourth gear 404, the fifth gear 405 meshes with the sixth gear 406, the seventh gear 407 meshes with the eighth gear 408 through the idler gear 415, and the ninth gear meshes with the eighth gear 408. The gear 409 meshes with the tenth gear 410 , the eleventh gear 411 meshes with the twelfth gear 412 , and the thirteenth gear 413 meshes with the fourteenth gear 414 . The idler 415 is used to realize the reverse gear function, and the direction of the rotational speed is changed through the idler, and the gear passing through the idler is the reverse gear.

The nine-speed dual-clutch transmission has nine forward gears and three reverse gears, specifically:

Referring to Fig. 2, when the nine-speed dual-clutch transmission is in the 1st gear state, the fourth synchronizer 204 and the fifth synchronizer 205 work, the fourth synchronizer 204 meshes with the eleventh gear 411 to the left, and the fifth synchronizer 205 to the left Mesh the second gear 402; the power of the engine 101 is input to the gearbox module through the first clutch 202 and the first input shaft 302, and then passes through the first gear 401, the second gear 402, the fifth synchronizer 205, the intermediate shaft 304, the tenth The second gear 412 , the eleventh gear 411 , and the fourth synchronizer 204 are finally output to the transmission output shaft 303 .

Referring to Fig. 3, when the nine-speed dual-clutch transmission is in the second gear state, the fourth synchronizer 204 and the sixth synchronizer 206 work, the fourth synchronizer 204 meshes with the eleventh gear 411 to the left, and the sixth synchronizer 206 to the right Mesh the intermediate shaft 304; after the power of the engine 101 is input to the gearbox module through the second clutch 201 and the second input shaft 301, it passes through the fifth gear 405, the sixth gear 406, the intermediate shaft sleeve shaft 305, the sixth synchronizer 206, the intermediate The shaft 304 , the twelfth gear 412 , the eleventh gear 411 , and the fourth synchronizer 204 are finally output to the transmission output shaft 303 .

Referring to Fig. 4, when the nine-speed dual-clutch transmission is in the third gear state, the fourth synchronizer 204 and the fifth synchronizer 205 work, the fourth synchronizer 204 meshes with the eleventh gear 411 to the left, and the fifth synchronizer 205 to the right Mesh the fourth gear 404; the power of the engine 101 is input to the gearbox module through the first clutch 202 and the first input shaft 302, and then passes through the third gear 403, the fourth gear 404, the fifth synchronizer 205, the intermediate shaft 304, the tenth The second gear 412 , the eleventh gear 411 , and the fourth synchronizer 204 are finally output to the transmission output shaft 303 .

Referring to Fig. 5, when the nine-speed dual-clutch transmission is in the 4th gear state, the sixth synchronizer 206 works, and the sixth synchronizer 206 meshes with the tenth gear 410 to the left; the power of the engine 101 passes through the second clutch 201 and the second input shaft 301 After being input into the transmission module, it passes through the fifth gear 405 , the sixth gear 406 , the intermediate shaft sleeve shaft 305 , the sixth synchronizer 206 , the tenth gear 410 , and the ninth gear 409 , and finally outputs to the transmission output shaft 303 .

Referring to Fig. 6, when the nine-speed dual-clutch transmission is in the 5th gear state, the fourth synchronizer 204 and the fifth synchronizer 205 work, the fourth synchronizer 204 meshes with the thirteenth gear 413 to the right, and the fifth synchronizer 205 to the left Mesh the second gear 402; the power of the engine 101 is input to the gearbox module through the first clutch 202 and the first input shaft 302, and then passes through the first gear 401, the second gear 402, the fifth synchronizer 205, the intermediate shaft 304, the tenth The fourth gear 414 , the thirteenth gear 413 , and the fourth synchronizer 204 are finally output to the transmission output shaft 303 .

Referring to Fig. 7, when the nine-speed dual-clutch transmission is in the 6th gear state, the fourth synchronizer 204 and the sixth synchronizer 206 work, the fourth synchronizer 204 meshes with the thirteenth gear 413 to the right, and the sixth synchronizer 206 rotates to the right Mesh the intermediate shaft 304; after the power of the engine 101 is input to the gearbox module through the second clutch 201 and the second input shaft 301, it passes through the fifth gear 405, the sixth gear 406, the intermediate shaft sleeve shaft 305, the sixth synchronizer 206, the intermediate The shaft 304 , the fourteenth gear 414 , the thirteenth gear 413 , and the fourth synchronizer 204 are output to the transmission output shaft 303 .

Referring to Fig. 8, when the nine-speed dual-clutch transmission is in the 7th gear state, the fourth synchronizer 204 and the fifth synchronizer 205 work, the fourth synchronizer 204 meshes with the thirteenth gear 413 to the right, and the fifth synchronizer 205 rotates to the right Mesh the fourth gear 404; the power of the engine 101 is input to the gearbox module through the first clutch 202 and the first input shaft 302, and then passes through the third gear 403, the fourth gear 404, the fifth synchronizer 205, the intermediate shaft 304, the tenth The fourth gear 414 , the thirteenth gear 413 , and the fourth synchronizer 204 are finally output to the transmission output shaft 303 .

Referring to Fig. 9, when the nine-speed dual-clutch transmission is in the 8th gear state, the third synchronizer 203 works, and the third synchronizer 203 engages the second input shaft 301 to the left, and the power of the engine 101 passes through the second clutch 201 and the second input shaft 301 is directly output to the gearbox output shaft 303.

Referring to Fig. 10, when the nine-speed dual-clutch transmission is in the 9th gear state, the third synchronizer 203 and the fifth synchronizer 205 work, the third synchronizer 203 meshes with the second input shaft 301 to the left, and the fifth synchronizer 205 to the right Mesh the fourth gear 404; after the power of the engine 101 is input to the gearbox module through the first clutch 202 and the first input shaft 302, it passes through the third gear 403, the fourth gear 404, the fifth synchronizer 205, the intermediate shaft 304, the sixth The synchronizer 206 , the intermediate shaft sleeve shaft 305 , the sixth gear 406 , the fifth gear 405 , the second input shaft 301 , and the third synchronizer 203 are finally output to the transmission output shaft 303 .

Referring to Fig. 11, when the nine-speed dual-clutch transmission is in the reverse first gear state, the third synchronizer 203, the fifth synchronizer 205 and the sixth synchronizer 206 work, the third synchronizer 203 meshes with the seventh gear 407 to the right, and the The fifth synchronizer 205 meshes with the second gear 402 to the left, and the sixth synchronizer 206 meshes with the intermediate shaft sleeve shaft 304 to the left. After the power of the engine 101 is input to the transmission module through the first clutch 202 and the first input shaft 302, it passes through the first gear 401, second gear 402, fifth synchronizer 205, intermediate shaft 304, sixth synchronizer 206, intermediate shaft sleeve shaft 305, eighth gear 408, idler gear 415, seventh gear 407, third synchronizer 203, Finally output to the gearbox output shaft 303.

Referring to Fig. 12, when the nine-speed dual-clutch transmission is in the reverse second gear state, the third synchronizer 203 works, and the third synchronizer 203 engages the seventh gear 407 to the right, and the power of the engine 101 passes through the second clutch 201 and the second input shaft After 301 is input into the gearbox module, it passes through the fifth gear 405, the sixth gear 406, the intermediate shaft sleeve shaft 305, the eighth gear 408, the idler gear 415, the seventh gear 407, and the third synchronizer 203, and finally outputs to the gearbox output shaft 303 .

Referring to Fig. 13, when the nine-speed dual-clutch transmission is in the reverse third gear state, the third synchronizer 203, the fifth synchronizer 205 and the sixth synchronizer 206 work, the third synchronizer 203 engages the seventh gear 407 to the right, and the third synchronizer 203 engages the seventh gear 407 to the right. The fifth synchronizer 205 engages the fourth gear 404 to the right, and the sixth synchronizer 206 engages the intermediate shaft sleeve shaft 305 to the left. After the power of the engine 101 is input to the transmission module through the first clutch 202 and the first input shaft 302, it passes through the third gear in turn. gear 403, fourth gear 404, fifth synchronizer 205, intermediate shaft 304, sixth synchronizer 206, intermediate shaft sleeve shaft 305, eighth gear 408, idler gear 415, seventh gear 407, third synchronizer 203, Finally output to the gearbox output shaft 303.

The shift process of the nine-speed dual-clutch transmission from 1st gear to 2nd gear is as follows: the load of the engine 101 is reduced, the first clutch 202 is disengaged, and the second clutch 201 is engaged; the fifth synchronizer 205 no longer works, and only the fourth synchronizer 204 and the sixth synchronizer 206 work, and the sixth synchronizer 206 engages the intermediate shaft 304 to the right, and the engine 101 outputs power.

The transmission ratio value of each gear of the nine-speed dual-clutch transmission of the present embodiment and the step ratio between each gear are shown in the following table:

The operating logic of each working element of the nine-speed dual-clutch transmission is shown in the following table:

Among them: K1 indicates the first clutch, K2 indicates the second clutch; a indicates that the fifth synchronizer 205 is combined to the left, b indicates that the fifth synchronizer 205 is combined to the right; f indicates that the sixth synchronizer 206 is combined to the left, and c indicates that the fifth synchronizer 205 is combined to the left. Six synchronizers 206 are combined to the right; d indicates that the third synchronizer 203 is combined to the right, e indicates that the third synchronizer 203 is combined to the left; g indicates that the fourth synchronizer 204 is combined to the left, and h indicates that the fourth synchronizer 204 is combined to the right combined.

The above are only preferred implementations of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the technical principle of the present invention. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (4)

1. nine fast double-clutch speed changers, comprising: motor (101), clutch module (102), gearbox module; Described motor (101) is connected with gearbox module by clutch module (102); It is characterized in that:

Described clutch module (102) comprising: first input shaft (302) of first clutch (202) and correspondence, second input shaft (301) of second clutch (201) and correspondence; The coaxial empty set of described first input shaft (302) described second input shaft (301) outward;

Described gearbox module (103) comprising: the output shaft of gear-box (303) coaxially arranged with described second input shaft (301); The jack shaft (304) be arranged in parallel with described output shaft of gear-box (303), coaxial empty set are at described jack shaft (304) jack shaft sleeve (305) outward;

Described first input shaft (302) connects the first gear (401) and the 3rd gear (403) successively along its transmission of power direction; The upper connection the 5th gear (405) of described second input shaft (301); Described output shaft of gear-box (303) connects the 3rd synchronizer (203), the 9th gear (409) and the 4th synchronizer (204) successively along its transmission of power direction; Described jack shaft (304) connects the 5th synchronizer (205), the 12 gear (412) and the 14 gear (414) successively along its transmission of power direction; Described jack shaft sleeve (305) connects successively the 6th gear (406), octadentate wheel (408) and the 6th synchronizer (206) along its transmission of power direction;

7th gear (407), the 11 gear (411) and the 13 gear (413) successively empty set on described output shaft of gear-box (303); Second gear (402) and the 4th gear (404) successively empty set on described jack shaft (304); Tenth gear (410) empty set is on described jack shaft sleeve (305);

Synchronous described output shaft of gear-box (303) and the second input shaft (301) when described 3rd synchronizer (203) engages left, to the right synchronous described output shaft of gear-box (303) and the 7th gear (407) during engagement; Synchronous described output shaft of gear-box (303) and the 11 gear (411) when described 4th synchronizer (204) engages left, to the right synchronous described output shaft of gear-box (303) and described 3rd gear (403) during engagement; Synchronous described jack shaft (304) and the second gear (402) when described 5th synchronizer (205) engages left, to the right synchronous described jack shaft (304) and described 4th gear (404) during engagement; Synchronous described jack shaft sleeve (305) and described tenth gear (410) when described 6th synchronizer (206) engages left, to the right synchronous described jack shaft sleeve (305) and jack shaft (304) during engagement;

Described first gear (401) is engaged with described second gear (402), described 3rd gear (403) engages with described 4th gear (404), described 5th gear (405) engages with described 6th gear (406), described 7th gear (407) is taken turns (408) by described idle pulley (415) with described octadentate and is engaged, described 9th gear (409) engages with described tenth gear (410), described 11 gear (411) engages with described 12 gear (412), described 13 gear (413) engages with described 14 gear (414).

2. nine fast double-clutch speed changers according to claim 1, is characterized in that: during 1 grade of state, described 4th synchronizer (204), described 5th synchronizer (205) work; Described 4th synchronizer (204) engages left, and described 5th synchronizer (205) engages left; Described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described first gear (401), described second gear (402), described 5th synchronizer (205), described jack shaft (304), described 12 gear (412), described 11 gear (411), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 2 grades of states, described 4th synchronizer (204), described 6th synchronizer (206) work, described 4th synchronizer (204) engages left, and described 6th synchronizer (206) engages to the right; Described motor (101) power is by after described second clutch (201) and described second input shaft (301) input gearbox module, successively through described 5th gear (405), described 6th gear (406), described jack shaft sleeve (305), described 6th synchronizer (206), described jack shaft (304), described 12 gear (412), described 11 gear (411), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 3 grades of states, described 4th synchronizer (204), described 5th synchronizer (205) work, described 4th synchronizer (204) engages left, and described 5th synchronizer (205) engages to the right; Described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described 3rd gear (403), described 4th gear (404), described 5th synchronizer (205), described jack shaft (304), described 12 gear (412), described 11 gear (411), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 4 grades of states, described 6th synchronizer (206) work, described 6th synchronizer (206) engages left; Described motor (101) power is by after described second clutch (201) and described second input shaft (301) input gearbox module, successively through described 5th gear (405), described 6th gear (406), described jack shaft sleeve (305), described 6th synchronizer (206), described tenth gear (410), described 9th gear (409), output to described output shaft of gear-box (303);

During 5 grades of states, described 4th synchronizer (204), described 5th synchronizer (205) work, described 4th synchronizer (204) engages to the right, and described 5th synchronizer (205) engages left; Described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described first gear (401), described second gear (402), described 5th synchronizer (205), described jack shaft (304), described 14 gear (414), described 13 gear (413), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 6 grades of states, described 4th synchronizer (204), described 6th synchronizer (206) work, described 4th synchronizer (204) engages to the right, and described 6th synchronizer (206) engages to the right; Described motor (101) power is by after described second clutch (201) and described second input shaft (301) input gearbox module, successively through described 5th gear (405), described 6th gear (406), described jack shaft sleeve (305), described 6th synchronizer (206), described jack shaft (304), described 14 gear (414), described 13 gear (413), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 7 grades of states, described 4th synchronizer (204), described 5th synchronizer (205) work, described 4th synchronizer (204) engages to the right, and described 5th synchronizer (205) engages to the right; Described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described 3rd gear (403), described 4th gear (404), described 5th synchronizer (205), described jack shaft (304), described 14 gear (414), described 13 gear (413), described 4th synchronizer (204), output to described output shaft of gear-box (303);

During 8 grades of states, described 3rd synchronizer (203) work, described 3rd synchronizer (203) engages left, and described motor (101) power directly outputs to described output shaft of gear-box (303) by described second clutch (201) and described second input shaft (301);

During 9 grades of states, described 3rd synchronizer (203), described 5th synchronizer (205) work, described 3rd synchronizer (203) engages left, and described 5th synchronizer (205) engages to the right, described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described 3rd gear (403), described 4th gear (404), described 5th synchronizer (205), described jack shaft (304), described 6th synchronizer (206), described jack shaft sleeve (305), described 6th gear (406), described 5th gear (405), described second input shaft (301), described 3rd synchronizer (203), output to described output shaft of gear-box (303).

3. nine fast double-clutch speed changers according to claim 1, is characterized in that: during 1 grade of state, described 3rd synchronizer (203), described 5th synchronizer (205) and described 6th synchronizer (206) work, described 3rd synchronizer (203) engages to the right, described 5th synchronizer (205) engages left, described 6th synchronizer (206) engages left, after described motor (101) power inputs gearbox module by described first clutch (202) and described first input shaft (302), successively through described first gear (401), described second gear (402), described 5th synchronizer (205), described jack shaft (304), described 6th synchronizer (206), described jack shaft sleeve (305), described octadentate wheel (408), described idle pulley (415), described 7th gear (407), described 3rd synchronizer (203), outputs to described output shaft of gear-box (303),

During 2 grades of states, described 3rd synchronizer (203) work, described 3rd synchronizer (203) engages to the right, described motor (101) power is by after described second clutch (201) and described second input shaft (301) input gearbox module, successively through described 5th gear (405), described 6th gear (406), described jack shaft sleeve (305), described octadentate wheel (408), described idle pulley (415), described 7th gear (407), described 3rd synchronizer (203), output to described output shaft of gear-box (303),

During 3 grades of states, described 3rd synchronizer (203), described 5th synchronizer (205) and described 6th synchronizer (206) work, described 3rd synchronizer (203) engages to the right, described 5th synchronizer (205) engages to the right, described 6th synchronizer (206) engages left, described motor (101) power is by after described first clutch (202) and described first input shaft (302) input gearbox module, successively through described 3rd gear (403), described 4th gear (404), described 5th synchronizer (205), described jack shaft (304), described 6th synchronizer (206), described jack shaft sleeve (305), described octadentate wheel (408), described idle pulley (415), described 7th gear (407), described 3rd synchronizer (203), output to described output shaft of gear-box (303).

4. nine fast double-clutch speed changers according to claim 1, it is characterized in that: rising 2 gear shift processes by 1 grade is: described motor (101) load down, described first clutch (202) is separated, described second clutch (201) engages, described 5th synchronizer (205) no longer works, described 6th synchronizer (206) engages to the right, and described motor (101) provides torque support, realizes power gear shifting.