RU2542810C1 - Six-stage nonaligned gearbox with dual clutch - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: dual clutch is arranged at gearbox input. One part of driven plates of this clutch is fitted on tubular shaft with one driving gear fitted thereon. Gearbox primary shaft is arranged inside said tubular shaft with four driving gears fitted thereon and engaged with five driven gears running on output shaft. Extra reverse gear is fitted between reverse driving and driven gears while two high gear wheels of output shaft are integrated into a set. First three-position clutch is arranged between the latter and mid gear. Second three-position clutch is arranged between driven reverse gears and low gear wheels.

EFFECT: enhanced performances, better configuration.

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Description

The invention relates to transport engineering, to the transmission of transport vehicles.

Transmission units are known - gearboxes (KP) with step change of gear ratios, containing gears, shafts, bearings, gear shifting devices used on domestic and foreign cars (Automobiles: Design, construction and calculation. Transmission. / Ed. A.I. Grishkevich.Mn .: Higher school, 1985.- 240 p.).

These units are structurally complex, metal-intensive.

Closest to the proposed gearbox (KP) is KP according to patent No. 2149767 (bull. No. 15 from 05.27.2000).

The gearbox contains an assembly body in which there are parallel shafts with four pairs of gears of external gearing, a series of reverse gears, a tubular shaft located on the input shaft, on which four gears are fixed, and one gear is installed freely, between this gear and the gear of the tubular shaft three-position clutch of the input shaft, on the output shaft all gears are mounted freely, two of them are combined into a block and engaged with gears located next to the three-position clutch of the primary shaft, the first three-position clutch output shaft is disposed between the gear unit and the secondary pinion, the second three-position clutch output shaft is disposed between the lower driven gears and reverse.

The described gearbox is simpler than the typical designs of transmission units described in the book, but has the disadvantages of limiting the operational and layout characteristics of the vehicle when shifting gears with a power flow rupture, insufficient gearbox range (ratio of gear ratios of lower and higher gears), which is limited from -for the increased diameter of the gears of the tubular shaft.

The problem to which the invention is directed, is to expand the operational and layout capabilities of the vehicle due to pairwise gear shifting practically without breaking the power flow, as well as increasing the range of the gearbox by reducing the diameter of the drive gears.

The problem is solved by achieving a technical result, which consists in improving the process of gear shifting by installing a dual clutch, as well as by increasing the range of the gearbox while reducing the diameter of the drive gears mounted directly on the input shaft.

The essence of the proposed device lies in the fact that a six-speed non-coaxial gearbox containing the unit body, in the supports of which there are shafts in parallel, on which four pairs of external gears and a series of reverse gears are installed, an additional reverse gear is mounted on an axis located between the primary and output shafts, driven gears are mounted freely on the output shaft, two of them are combined into a block, the first three-position clutch is located between the block and the middle gear one shaft, the second three-position clutch is located between the lower gears and the reverse gear, while, in contrast to the prototype, the input clutch discs are installed on the input shaft of the left clutch, a tubular shaft is freely located between them and the gear of the primary shaft, on which the clutch discs of the right clutch are installed and fixed gear, coaxial to the input shaft in the dual clutch housing is the input shaft with a dual clutch cover fixed to it with drive disks.

The proposed technical solution allows the dual clutch to shift gears in pairs (6 and 5, 4 and 3, 2 and 1) practically without interrupting the power flow, which facilitates the process of driving a vehicle and increases its cross-country ability. Fastening the gears directly to the input shaft allows you to increase the gearbox range by reducing the diameter of the drive gear of the input shaft and increasing the gear ratio in a pair of gears from the input shaft to the output shaft, which also optimizes the distribution of the range over the pairs of gears.

Figure 1 shows the kinematic diagram of a six-speed non-coaxial gearbox 6R2 (6 forward gears and 2 reverse gears) with dual clutch. In the lower part (under figure 1) the numbers of pairs of gears are marked.

Figure 2 shows the radiation diagram of the KP 6R2 with tables of the positions of the clutches and clutches in different gears. The top row of the table shows the numbers of gear pairs included. On the horizontal scales of the diagram, the values of the gear ratios of pairs of gears and gears are presented in a logarithmic form. Forward gear numbers (6-1) are indicated above the upper horizontal, reverse gears (2R, 1R) are indicated below the lower horizontal. On the extreme horizontals, the gear ratios are given to the output shaft, t.0 on the middle horizontal to the input shaft. The numbers of the pairs of gears are indicated on the beams. The tilt of the beam to the right indicates the decelerating mode of operation of a pair of gears: the more the beam, the greater the gear ratio. The tilt of the beam to the left characterizes the accelerating mode of operation of a pair of gears. The tilt of the beam of each pair of gears is constant on any part of the radiation diagram.

The proposed device consists of a housing KP 1 and a dual clutch housing 2, in their bearings are input 3 and primary 4 shafts, as well as an output shaft 5 located parallel to them. A primary shaft 6 with a gear 7 fixed to it is freely mounted on the primary shaft 4. The pinion gears 8-11 are rigidly fixed on the input shaft 4. The pinion gears 12-16 are freely mounted on the output shaft 5. The pinion gear 11 is engaged with the pinion gear 16 through an additional pinion gear 17, which is mounted on the axis 18, laid between the primary 4 and output 5 shafts. Gears 12 and 13 are combined in block 19 and engaged with gears 7 of tubular shaft 6 and 8 of input shaft 4. Gears 9 and 10 of primary shaft 4 are engaged with gears 15 and 16 of output shaft 5, respectively. Between gears 13 and 14 there is a first three-position clutch 20 (A) of the output shaft 5. The second three-position clutch 21 (B) of the output shaft 5 is located between the gears 15 and 16. A dual clutch cover 22 is fixed to the input shaft 3, there are drive clutch disks 23 therein. The driven discs 24 of the left clutch (L) are mounted on the input shaft 4, and the driven discs 25 of the right clutch (P) are mounted on the tubular shaft 6. A pressure device pressing the drive and driven discs when engaging the clutch is not shown.

Between the input shaft 3 and the casing 22 of the dual clutch is possible to install a gear (cylindrical, bevel, hypoid, etc.).

KP works as follows. Dual clutch is triggered at each shift, which occurs almost without interruption in the power flow. Clutch 20 (A) changes its position after two gear changes, and clutch 21 (B) after four successive high gear changes.

First gear

We turn on the right clutch (P), clutch A (20) in the neutral position (H), clutch B (21) in the left (L) (see figure 2, the upper table above t.1). The 1st, 2nd and 4th gear pairs are included.

The torque from the driven discs 25 of the right clutch (P) is transmitted to the tubular shaft 6, on a pair of gears 7-12, on block 19, on a pair of gears 13-8, input shaft 4, on a pair of gears 10-15 and clutch B (21 ) to the output shaft 5.

In the ray diagram (see Fig. 2), this transmission is represented by three rays: from t.0 in the middle horizontal, a steep beam 1p right up to the upper horizontal, then a steep beam 2p right down to the middle horizontal, then a gentle beam 4p right up to t .one.

Second gear

We turn on the left clutch (L), the rest of the clutch in the same position. Turn off the work of the 1st and 2nd pairs of gears.

The torque from the driven discs 24 of the left clutch (L) is transmitted to the input shaft 4, then, as in first gear.

On the radiation diagram, the transmission is represented by a flat beam 4p from v.0 in the middle horizontal to the right upwards to v.2 of the upper horizontal.

Third gear

The clutch, as in first gear, clutch A is switched to the right position (P), and clutch B is in neutral (H). The 1st, 2nd and 3rd gear pairs are included.

The torque, as in first gear, is transmitted from the tubular shaft 6 by a pair of gears 7-12, in block 19, by a pair of gears 13-8, the input shaft 4, then to a pair of gears 9-14 and a coupling A (20) to the output shaft 5.

On the ray diagram, this transmission is represented by three beams: from t.0 in the middle horizontal, a steep beam 1p right up to the upper horizontal, then a steep beam 2p right down to the middle horizontal, then a steep beam 3p right up to t.3.

Fourth gear

We turn on the left clutch (L), the rest of the clutch in the same position. Turn off the work of the 1st and 2nd pairs of gears.

From the left clutch, the torque, as in second gear, is transmitted to the input shaft 4, then, as in third gear.

In the beam diagram, this transmission is represented by a beam 3p from v.0 on the middle horizontal to the right upwards to v.4 on the upper horizontal.

Fifth gear

We turn on the right clutch (P), put the clutch A in the right position (P). The first pair of gears is working.

Torque is transmitted from the input shaft 4 by a pair of gears 7-12, in block 19 and by coupling 20 (A) to the output shaft 5.

In the beam diagram, this transmission corresponds to a steep beam 1p from v.0 on the middle horizontal to the right upwards to v.5 on the upper horizontal.

Sixth gear

We turn on the left clutch (L), the rest of the clutch in the same position. The 2nd pair of gears works.

From the left clutch, the torque is supplied to the input shaft 4, then a pair of gears 8-13 and a coupling 20 (A) to the output shaft 5.

In the beam diagram, this transmission is represented by a steep beam 2n to the left up from t.0 on the middle horizontal to t.6 on the upper horizontal.

First reverse - 1R

We turn on the right clutch (P), switch clutch A to the neutral position (N), clutch B - to the right position (P). The 1st and 2nd pairs of gears are included, as well as a number of reverse gears R.

The torque to the input shaft 4 is supplied, as in the first and third forward gears, then in a series of reverse gears 11-17-16, with the coupling B (21) to the output shaft 5.

On the ray diagram, this transmission is represented by three beams: from t.0 on the middle horizontal, a steep beam 1p right up to the upper horizontal, then a steep beam 2p right down to the middle horizontal, then a gentle ray R down to the right to the lower horizontal to T.1R.

Second Reverse - 2R

We turn on the left clutch (L), the couplings remain in the same position.

Torque to the input shaft 4 is supplied, as in the second, fourth and sixth forward gears, then, as in the previous gear.

In the beam diagram, this transmission is represented by the R beam down to the right on the lower horizontal to T.2R.

Designations

1 - housing KP,

2 - dual clutch housing;

3 - input shaft

4 - a primary shaft,

5 - output shaft

6 - tubular shaft,

7 - gear of the tubular shaft 6,

8-11 - driving gears mounted on the input shaft 4;

12-16 - driven gears freely mounted on the output shaft 5,

17 - additional reverse gear mounted on the axis 18,

18 - axis of the additional reverse gear 17,

19 - block gears 12 and 13 of the output shaft 5;

20 (A) - the first three-position coupling of the output shaft 5, located between the gears 13 and 14;

21 (B) - the second three-position coupling of the output shaft 5, located between the gears 15 and 16;

22 - dual clutch cover

23 - drive clutch discs 22,

24 - the driven discs of the left (L) clutch 22 mounted on the input shaft 4,

25 - driven discs of the right (P) clutch 22 mounted on a tubular shaft 6.

Claims (1)

A six-speed non-coaxial gearbox containing the body of the unit, in the supports of which there are shafts in parallel with four pairs of external gears and a series of reverse gears, an additional reverse gear mounted on an axis located between the primary and output shafts, driven gears on the output shaft installed freely, two of them are combined into a block, between the block and the middle gear the first three-position coupling of the output shaft is located, the second three-position coupling is located I wait for lower gears and reverse gears, characterized in that the input clutch discs of the left clutch are installed at the input of the input shaft, a tubular shaft is freely located between them and the gear of the input shaft, on which the clutch discs of the right clutch are installed and the gear is fixed, coaxial with the input shaft in the double housing the clutch is located the input shaft with a casing of dual clutch fixed to it with drive disks.

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