RU2529924C1 - Six-speed gear box with double clutch - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to gear boxes (GB) with two clutches. A double clutch is arranged at the gear box input, part of driven disks in the said clutch is installed on the primary GB shaft, while the other part is arranged on a tubular shaft. The above shafts are fitted by gears engaged with the gears of a layshaft where five gears are installed with two of them being engaged with the gears freely mounted on the secondary shaft; a three-position shift collar is installed between them. A gear engaged with the layshaft gear is freely mounted on a tubular end of the secondary shaft and the three-position shift collar is installed there as well.

EFFECT: expanded performance and layout characteristics of a vehicle by increasing its cross-country capacity and making its control easier, better GB durability due to increased rigidity of shafts at their shorter length.

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Description

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

Transmission aggregates are known - gearboxes (KP) with step change of gear ratios, containing gears, shafts, bearings, gearshift devices used on domestic and foreign cars (Osepchugov V.V., Frumkin A.K. Car: Structural analysis, elements calculation. - M .: Engineering, 1989. - 304 p.).

These units are structurally complex and metal-intensive.

Closest to the proposed gearbox (KP) is KP according to patent No. 2176196 (Bull. No. 33 of 11/27/2001).

The gearbox contains an aggregate housing, in which there are parallel shafts with four pairs of gears of external gearing, a series of reverse gears, one gear fixed to the input shaft, which engages with the freely installed gear of the intermediate shaft, all other gears are fixed on the intermediate shaft, on the secondary shaft, all gears are mounted freely, between the first and second pairs of gears a double on-off shift clutch with oppositely deployed coupling halves is installed and, connected by a gearshift fork, between the second and third pairs of gears, as well as between the reverse gears and the fourth pair of gears, are two three-position gearshift clutches, additional reverse gears are mounted on an axis located between the intermediate and secondary shafts.

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 gear of the input shaft, since the support of the output shaft is located in its tip.

The problem to which the invention is directed, is to expand the operational and layout capabilities of the vehicle due to pairwise gear shifting with virtually no disruption of the power flow, with an increase in the gearbox range, an increase in the durability of the gearbox by reducing the shaft length.

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 when moving the support from the tip of the primary shaft to the tip of the secondary shaft, increasing the durability of the gearbox by increasing the stiffness of the shafts with decreasing their lengths.

The essence of the proposed device lies in the fact that the six-speed gearbox containing the body of the unit, in the supports of which there are parallel shafts on which four pairs of external gears and a series of reverse gears are mounted, four gears are fixed on the intermediate shaft, between two gears freely installed on the secondary shaft, a three-position switching clutch is located, an additional reverse gear is mounted on an axis located between the intermediate and secondary shafts, p At the same time, in contrast to the prototype, a tubular tip is mounted on the secondary shaft with a support in the inner wall of the gearbox housing, the input shaft support is located in this tip, the gear is freely mounted on the tubular tip, engaged with the intermediate shaft gear, and the three-position switching clutch is located next to the gear mounted on the input shaft on which the left clutch discs are mounted, a tubular shaft is freely located between them, on which the right clutch discs are mounted captured and attached pinion gear and the tubular primary shaft mesh with gears fixed on the intermediate shaft, input shaft coaxially within the housing is located a dual clutch input shaft with a casing secured thereon with leading dual clutch discs.

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 throughput. Moving the support of the secondary shaft in the tip of the primary shaft to the support of the primary shaft in the tubular tip of the secondary shaft allows you to increase the gearbox range by reducing the diameter of the gear wheel of the input shaft and increasing the gear ratio in the pair of gears from the input shaft to the intermediate shaft, which also optimizes the distribution of the range in pairs gears. The inner wall of the gearbox housing increases the rigidity of the unit and the durability of the gearbox by increasing the rigidity of the shafts while decreasing their length.

Figure 1 shows the kinematic diagram of a six-speed three-shaft 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 reduced to the secondary shaft, and on the middle horizontal to the intermediate 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 the 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 with an inner wall 2 and a dual clutch housing 3, input 4 and primary 5 shafts, as well as a secondary shaft 6 with a tubular tip 7. are arranged coaxially in their bearings. A tubular shaft 8 is freely mounted on the primary shaft 5. Intermediate shaft 9 is parallel to shafts 4-8. Gears 10-14 are rigidly fixed on the intermediate shaft 9. Gear 10 is engaged with gear 15, which is mounted on the tubular shaft 8. Gear 11 is engaged with gear 16, mounted on the input shaft 5. Gear 12 is engaged with gear 17, which is freely mounted on the tubular the tip 7 of the secondary shaft 6. The gears 18 and 19 are freely mounted on the secondary shaft 6. The gear 13 is engaged with the gear 18, and the pinion gear 14 is engaged with the driven gear 19 through an additional gear 20, which is mounted on the axis 21, Assumption 9 between the intermediate and secondary shafts 6. On the tubular tip 7 between the gears 16 and 17 is a three-position clutch 22 (A). A three-position clutch 23 (B) of the secondary shaft 6 is located between the gears 18 and 19. A dual clutch casing 24 is fixed to the input shaft 4, and clutch driving disks 25 are located therein. The driven clutch discs 26 of the left clutch (L) are mounted on the input shaft 5, and the driven clutch discs of the right clutch (P) 27 are mounted on the tubular shaft 8. A pressure device that presses the drive and clutch discs when engaging the clutch is not shown.

Between the input shaft 4 and the casing 24 of the dual clutch is possible to install a gear (cylindrical, bevel, hypoid, etc.).

The gearbox works as follows: dual clutch is triggered at each shift, which occurs almost without interruption in the power flow. Clutch 22 (A) changes its position after two shifts, and clutch 23 (B) after four successive shifts of higher gears.

First gear

We turn on the left clutch (L), clutch A (22) in the neutral position (H), clutch B (23) in the right - P (see figure 2, the upper table above t.1).

The torque from the left clutch (L) is transmitted to the input shaft 5, on a pair of gears 16-11, along the intermediate shaft 9, to a pair of gears 13-18 and by coupling B (23) to the secondary shaft 6.

On the radiation diagram (see figure 2) this transmission is represented by two rays: from t.5 on the upper horizontal, a gentle beam 2p right down to the middle horizontal, then a gentle beam 4p right up to t.1.

Second gear

We turn on the right clutch (P), the rest of the clutch in the same position.

The torque from the right clutch (P) is transmitted to the tubular shaft 8, on a pair of gears 15-10 to the intermediate shaft 9, then - as in first gear.

On the ray diagram, this transmission is represented by two rays: from point 5 on the upper horizontal, a steep beam 1p right down to the middle horizontal, then beam 4p right up to point 2.

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 torque, as in the first gear, is transmitted from the input shaft 5 by a pair of gears 16-11 to the intermediate shaft 9, then to a pair of gears 12-17 and a coupling A (22) in the right position to the tubular tip 7 and the secondary shaft 6.

On the beam diagram, this transmission is represented by two rays: from t.5, beam 2p is right down, then beam 3p is vertically up to t.3.

Fourth gear

We turn on the right clutch (P), the rest of the clutch in the same position.

From the right clutch, the torque, as in second gear, is transmitted to the intermediate shaft 9, then as in third gear.

On the beam diagram, this transmission is represented by two rays: from point 5, beam 1 is directed steeply down to the right, then beam 3 is upward to point 4.

Fifth gear - direct

We turn on the left clutch (L), put the clutch A in the left position (L). Torque is transmitted from the primary shaft 5 by the clutch 22 (A) to the tip 7 and the secondary shaft 6.

On the beam diagram this transmission corresponds to t.5.

Sixth gear

We turn on the right clutch (P), the rest of the clutch in the same position.

As in the second and fourth gears, the torque is transmitted to the intermediate shaft 9, then a pair of gears 11-16 in accelerated mode, then, as in the previous gear, to the tip 7 and the secondary shaft 6.

On the beam diagram, this transmission is represented by two rays: from t.5 beam 1p down to the right, then a flat beam 2p up left to t.6.

First reverse - 1R

We turn on the left clutch (L), switch the clutch A to the neutral position (H) as in the first and third gears, clutch B - to the left position (L).

The torque to the intermediate shaft 9 is supplied, as in the first and third forward gears, then in a series of reverse gears 14-20-19, with the coupling B (23) to the secondary shaft 6.

On the ray diagram this transmission is represented by two beams: from t.5 a gentle beam 2n down to the right to the middle horizontal, then a gentle ray R down to the right to the lower diagonal to t.1R.

Second Reverse - 2R

We turn on the right clutch (P), the couplings remain in the same position.

The torque to the intermediate shaft 9 is supplied, as in the second and fourth forward gears, then as in the previous gear.

In the beam diagram, this transmission is represented by two beams: from point 5, a steep beam 1n down to the right to the middle horizontal, then the beam R down to the right to the lower horizontal to point 2R.

Designations

1 - housing KP,

2 - the inner wall of the housing of the gearbox,

3 - dual clutch housing;

4 - input shaft

5 - a primary shaft,

6 - a secondary shaft,

7 - a tubular tip of the secondary shaft 6;

8 - tubular shaft,

9 - an intermediate shaft,

10-14 - gears mounted on the intermediate shaft 9,

15 - gear of the tubular shaft 8,

16 - gear mounted on the input shaft 5;

17 - gear, freely mounted on the tubular tip 7 of the secondary shaft 6,

18, 19 - gears freely mounted on the secondary shaft 6,

19 - driven gear reverse

20 - additional reverse gear mounted on the axis 21,

21 - axis of the additional reverse gear 20,

22 (A) - three-position coupling of the tubular tip 7 located between the gears 16 and 17;

23 (B) - three-position clutch of the secondary shaft 6, located between the gears 18 and 19;

24 - dual clutch cover

25 - drive clutch disc 26,

26 - driven discs of the left (L) clutch 24 mounted on the input shaft 5,

27 - driven discs of the right (P) clutch 24 mounted on a tubular shaft 8.

Claims (1)

A six-speed gearbox containing the unit body, in the supports of which there are shafts in parallel, on which four pairs of external gears and a number of reverse gears are mounted, four gears are fixed on the intermediate shaft, between the two gears freely mounted on the secondary shaft, there is a three-position switching clutch , an additional reverse gear is mounted on an axis located between the intermediate and secondary shafts, characterized in that tubulars are fixed on the secondary shaft th tip with a support in the inner wall of the gearbox housing, in this tip there is a support of the input shaft, a gear is freely mounted on the tubular tip engaged with the gear of the intermediate shaft, and a three-position shift clutch is located next to the gear fixed to the input shaft on which the driven disks of the left clutch, between them a tubular shaft is freely located, on which the driven disks of the right clutch are mounted and the gear, gears of the primary and tubular shaft are fixed s are engaged with gears fixed on the intermediate shaft, coaxially with the primary shaft in the dual clutch housing, an input shaft with a dual clutch casing fixed to it with drive disks is located.

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