CN101457815A

CN101457815A - Triaxial, seven-gearing and double clutch automobile automatic transmission DCT drive unit

Info

Publication number: CN101457815A
Application number: CNA2009100100297A
Authority: CN
Inventors: 郭兆丰
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-08
Filing date: 2009-01-08
Publication date: 2009-06-17

Abstract

The invention provides a three-axis and seven-speed dual clutch automatic transmission (DCT) driven system, which is characterized in that a set of clutches are arranged on a transmission main shaft while another set of clutches are arranged on a transmission countershaft. A third, fourth, fifth and sixth gear arranged on the countershaft are driven by the two sets of clutches alternately. A power take-off shaft is provided with a first, second and seventh gear. Power is output from the power take-off shaft for all gears from the first to the seventh. The first gear and the second gear are the same pair of gears; the third gear and the fourth gear are the same pair of gears, while the fifth gear and the sixth gear are the same pair of gears. Upshifts from the first gear to the second gear, from the third gear to the fourth gear and from the fifth gear to the sixth gear are respectively realized by two clutches with the same quality and different speed ratios alternatively. The invention has the advantages of fewer shift times, prolonged useful life, smooth upshift, quick speed-raising, saving energy and reducing the cost.

Description

Three-shaft, seven-gear and dual-clutch automobile automatic transmission DCT power train

Technical field

The invention belongs to a kind of Motor Vehicle speed change gear, particularly a kind of three-shaft, seven-gear double-driving automobile automatic variable-speed drive system.

Background technique

The vehicle transmission of domestic production at present and use is manual structure speed changer fully, and is backward in technique, though some auto vendor is assembled with the automatic speed changing car load, and the complete dependence on import of automatic transmission.Though occur a kind of double-clutch automatic speed-change DCT in recent years, it develops and has many good qualities on hand shelves basis, but it is the little clutch of big clutch sleeve that deficiency, its double clutch construction are also arranged, and two output shafts are arranged, be the thin axle of axle sleeve equally, power output also is two axles, such four constitute six grades, big cover go out for a short time cover thin, must cause processing to go up some unnecessary highi degree of accuracy, increase operation, assembling complexity, maintenance difficult, waste man-hour, increasing cost.

Summary of the invention

The purpose of this invention is to provide a kind of triaxial, seven-gearing and double clutch automobile automatic transmission power train.At present external comparatively advanced double-clutch automatic speed changer for automobile DCT is six gears of four axles, 17 gears, 90 kilograms of weight, 369 millimeters of external form length.The utility model is 13 gears of seven gears of three axles, 65 kilograms of weight, 360 millimeters of external form length, reduces an axle, two bearings, four gears, weight and reduces 25 kilograms.Reduce part and promptly reduce fault, reduce wear, noise, improve the life-span to reduce cost, profile is little, in light weight, entrucking is convenient and swift, startups is fast, saves energy and reduce the cost.

The objective of the invention is to be achieved through the following technical solutions: it is provided with transmission main shaft, transmission countershaft and pto.It is characterized in that: transmission main shaft and power intake, the drive sprocket of clutch is housed, is installed in clutch on the jack shaft by the silent chain transmission.Another organizes the terminal installation of main shaft clutch, drives the jack shaft rotation respectively by silent chain.Jack shaft is provided with three, four, five, six gear shift gears, is transferred to pto respectively by driven gear behind the shift.The pto end is provided with two, three, seven grades of speed change gears, during these seven kinds of shelves speed changes, one, 2 two grade be with a pair of gear, three, 4 two grades is with a pair of gear, five, 6 two grades is with a pair of gear, it is characterized in that: one grade rises second gear, third gear to rise fourth gear, five liters six grades is respectively that two clutches by the different speed ratios of equal in quality alternately switch and realize.Thereby last power to seven grades is to drive the wheel rotation by pto and gear drive differential mechanism semiaxis to realize that seven kinds of different speed advance.

Of the present inventionly be a little: lack an axle, many gears than external similar double clutch DCT, few four gears of two bearings, 25 kilograms in light weight.Reduce part and promptly reduce fault, reduce wear, noise, improve the life-span to reduce cost, many gears, dwindle span operate steadily, energy-saving and cost-reducing.

Attached explanation

Fig. 1 is the structural representation of invention.

Fig. 2 is the clutch configuration schematic representation.

Embodiment

See input end, the fixed installation clutch B drive sprocket 14 of Fig. 1, the following transmission main shaft 15 of 2 concrete structures, end fixed installation clutch A outside friction disc wheel hub 33 rolls drive sprocket 9 and the interior friction plate dish drum 30 of consubstantiality is installed.

The transmission countershaft fixed installation is by movable sprocket 2; Roll five, six grades of drive sprockets 4 are installed; Three, four, five, six grades of fixing sliding sleeve external gears 27; Roll three, fourth gear driving gear 7; The driving gear 8 of fixing one, second gear; Reverse driving gear 18; Seven grades of fixing driving gears 11; Friction plate dish drum 30 in sprocket wheel 17 that the clutch B that rolls is passive and the consubstantiality; Fixing outside friction disc 33.

Five, six grades of fixing driven gears 28 are installed on the pto 1; Fixing three, fourth gear driven gear 25; Roll one, second gear driven gear 24; One, two, seven grade of fixing sliding sleeve external gear 22; Seven grades of driven gears 20 that roll; Fixing power output gear 19.

Working principle: fixing clutch B drive sprocket 14 rotations on the idling stage motor drive transmission main shaft 15, by being rotated of its silent chain 16 drive clutch B that link to each other by

movable sprocket

17 and 30 rollings of consubstantiality internal friction sheet dish drum.

When putting in the first speed, provide pressure oil to one, two, seven gear shift oil cylinders 12 by oil pump 13, the promotion selector fork is stirred one, two, seven grade of internal tooth sliding sleeve 21 left makes one, two, seven grades of sliding sleeve external gears 22 be connected with one, two, seven grade of driven gear 24.This moment by oil pump 13 provide pressure oil to clutch B oil pocket 34 see Fig. 2 make piston 35 axially push in friction plate 32 drive by the interior friction plate dish drum in the rotation 30 with outer wearing piece 31 tight connectings outside wearing piece wheel hub 33 and jack shaft rotate synchronously.Be fixed on one on the jack shaft 3, intermediate gear 8 be transferred to kneading one, one, two, seven grade of sliding sleeve external gear, 22 rotations that are connected with it of second gear driven gear 24.By 19 outputting powers of the power output gear on the pto 1.

Second gear: rising to second gear from one grade, promptly is second speed as long as switch to clutch A acting.

Third gear: rise to third gear from second gear, oil pump 13 provides pressure oil to three, four, five, six gear shift oil cylinders 23 that three, four, five, six gear shift shift forks 26 are stirred three, four, five, six grades of internal tooth sliding sleeves 6 to the right, three, four, five, six grades of sliding sleeve external gears 27 and three, fourth gear driving gear 7 are connected, three, four, five, six grades of fixing sliding sleeve external gears 25 import power into output shaft 1 thereupon, pass through power output gear 19 on clutch B rotation back, the drive jack shaft 3, output power.

Fourth gear: rising to fourth gear from third gear, promptly is fourth speed as long as switch to clutch A acting.

Five grades: rise to five grades from fourth gear, oil pump 13 provides pressure oil to three, four, five, six gear shift oil cylinders 23 that three, four, five, six gear shift shift forks 26 are stirred three, four, five, six grades of internal tooth sliding sleeves 6 left, three, four, five, six grades of sliding sleeve external gears 27 are connected with five, six grades of driving gears 4, clutch B rotates the back, drives three, four, five, six grades of fixing on the jack shaft 3 sliding sleeve external gears 4, by power output gear 19 outputting powers on five, six grades of driven gears drive ptos 1 of engagement.

Six grades: rising to six grades from five grades, promptly is six grades of speed as long as switch to clutch A acting.

Seven grades: rise to seven grades from six grades, oil pump 13 provides pressure oil to one, two, seven, gear shift oil cylinder 12 to promote one, two, seven gear shift shift forks 10, stirs one, two, seven to the right, a shelves internal tooth sliding sleeve 21 makes one, two, seven grade of sliding sleeve external gear 22 be connected with one, two, seven grade of driven gear 20, need not switch clutch A.Clutch A rotation, drive seven grades of driving gears 11 on the jack shaft 3, drive one, two, the seven grade of sliding sleeve external gear 22 that is connected, directly give pto 1 transmission of power by seven grades of driven gears 20 of engagement, and by power output gear 19 outputting powers.

Claims

1, a kind of three-shaft, seven-gear and dual-clutch automobile automatic transmission DCT power train, it is provided with transmission main shaft, transmission countershaft and pto.It is characterized in that: transmission main shaft and power intake, the drive sprocket of clutch is housed, is installed in clutch on the jack shaft by the silent chain transmission.Another organizes the terminal installation of main shaft clutch, drives the jack shaft rotation respectively by silent chain.Jack shaft is provided with three, four, five, six gear shift gears, is transferred to pto respectively by driven gear behind the shift.The pto end is provided with two, three, seven grades of speed change gears, during these seven kinds of shelves speed changes, one, 2 two grade be with a pair of gear, three, 4 two grades is with a pair of gear, five, 6 two grades is with a pair of gear, it is characterized in that: one grade rises second gear, third gear to rise fourth gear, five liters six grades is respectively that two clutches by the different speed ratios of equal in quality alternately switch and realize.Thereby last power to seven grades is to drive the wheel rotation by pto and gear drive differential mechanism semiaxis to realize that seven kinds of different speed advance.

2, three-shaft, seven-gear and dual-clutch automobile automatic transmission DCT power train according to claim 1 is characterized in that: one, 2 two grades is that three, 4 two grades is with a pair of gear with a pair of gear, and five, 6 two grades is with a pair of gear.

3, three-shaft, seven-gear and dual-clutch automobile automatic transmission DCT power train according to claim 1, it is characterized in that: one grade rises second gear; Third gear rises fourth gear; Five grades rise six grades, are alternately to be switched by the clutch of two homogenous quantities, different speed ratios to upgrade respectively.

4, three-shaft, seven-gear and dual-clutch automobile automatic transmission DCT power train according to claim 1 is characterized in that: transmission main shaft, and transmission countershaft, pto is and is arranged in parallel.