Planetary Power-Shift Multi-Stage Transmission, in Particular for an Internal Combustion Engine and/or Electric Motor Drive of a Motor Vehicle

Abstract

A powershift-capable multi-stage transmission having multiple forward gear ratios and one reverse gear ratio, a drive shaft (1), an output shaft (2), two planetary gear sets (RS1, RS2) which are coupled or coupleable to one another and which have at least one first, second, and third transmission element (1.1, 2.1; 1.2, 2.2; 1.3, 2.3), and multiple shift elements (10, 20, 30, 40, 50, 60, 70) which are assigned to the planetary gear sets (RS1, RS2) and selective shifting of which gives rise to a transmission ratio between the drive shaft (1) and the output shaft (2). At least three of the shift elements (10, 20, 30, 40, 50, 60, 70) are brakes by which the first, second, or third transmission element (1.1, 2.1; 1.2, 2.2; 1.3, 2.3) of the planetary gear sets (RS1, RS2) can be braked directly or indirectly against a component (G) fixed with respect to a housing.

Claims

1-16. (canceled)

17. A powershift-capable multi-stage transmission of planetary design, in particular for a combustion-engine-powered and/or electric-motor-powered drive of a motor vehicle, having gear ratio stages for multiple forward gear ratios and a reverse gear ratio, comprising: a drive shaft (1) which is also a first shaft; an output shaft (2) which is also a second shaft; two planetary gear sets (RS1, RS2) which are coupled or coupleable to one another and which each have at least a first transmission element (1.1, 2.1), a second transmission element (1.2, 2.2) and a third transmission element (1.3, 2.3); and multiple shift elements (10, 20, 30, 40, 50, 60, 70) which are assigned to the planetary gear sets (RS1, RS2) and the selective shifting of which gives rise to a transmission ratio, corresponding to the respective gear ratio stages, between the drive shaft (1) and the output shaft (2), wherein at least three of the shift elements (10, 20, 30, 40, 50, 60, 70) are brakes by which the first transmission element (1.1, 2.1), the second transmission element (1.2, 2.2) or the third transmission element (1.3, 2.3) of the planetary gear sets (RS1, RS2) can be braked directly or indirectly against a component (G) fixed with respect to a housing.

18. The multi-stage transmission of claim 17, wherein three of the shift elements (10, 20, 30, 40, 50, 60, 70) are closed in each of the multiple forward gear ratio stages and the reverse gear ratio.

19. The multi-stage transmission of claim 17, wherein: the first transmission element (1.1) of the first planetary gear set (RS1) is connected rotationally fixedly to a third shaft (3), the second transmission element (1.2) of the first planetary gear set (RS1) is connected rotationally fixedly to the drive shaft (1) and the third transmission element (1.3) of the first planetary gear set (RS1) is connected rotationally fixedly to a fourth shaft (4); and the first transmission element (2.1) of the second planetary gear set (RS2) is connected rotationally fixedly to a fifth shaft (5), the second transmission element (2.2) of the second planetary gear set (RS2) is connected rotationally fixedly to the fourth shaft (4) and the third transmission element (2.3) of the second planetary gear set (RS2) is connected rotationally fixedly to a sixth shaft (6).

20. The multi-stage transmission of claim 19, wherein: the third shaft (3) is connectable by a first shift element (10) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the component (G) fixed with respect to a housing; the fourth shaft (4) is operatively connectable by a second shift element (20) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the component (G) fixed with respect to the housing; the sixth shaft (6) is operatively connectable by a third shift element (30) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the component (G) fixed with respect to the housing; the drive shaft (1) is operatively connectable by a fourth shift element (40) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fifth shaft (5); the output shaft (2) is operatively connectable by a fifth shift element (50) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fourth shaft (4) and/or by a sixth shift element (60) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the sixth shaft (6); and the third shaft (3) is operatively connectable by a seventh shift element (70) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fifth shaft (5).

21. The multi-stage transmission of claim 20, wherein: six forward gear ratios are selectively engageable; the third shift element (30), the fourth shift element (40) and the fifth shift element (50) are closed in a first forward gear ratio of the six forward gear ratios; the third shift element (30), the fifth shift element (50) and the seventh shift element (70) are closed in a second forward gear ratio of the six forward gear ratios; the fourth shift element (40), the fifth shift element (50) and the seventh shift element (70) are closed in a third forward gear ratio of the six forward gear ratios; the first shift element (10), the fourth shift element (40) and the fifth shift element (50) are closed in a fourth forward gear ratio of the six forward gear ratios; the first shift element (10), the fourth shift element (40) and the sixth shift element (60) are closed in a fifth forward gear ratio of the six forward gear ratios; and the first shift element (10), the sixth shift element (60) and the seventh shift element (70) are closed in a sixth forward gear ratio of the six forward gear ratios.

22. The multi-stage transmission of claim 20, wherein one reverse gear ratio is selectively engageable, the second shift element (20), the fourth shift element (40) and the sixth shift element (60) being closed in the one reverse gear ratio.

23. The multi-stage transmission of claim 20, wherein one or more of the second shift element (20), the third shift element (30) and the fifth shift element (50) is a dog-clutch shift element.

24. The multi-stage transmission of claim 20, wherein the second shift element (20) and the third shift element (30) collectively form a common positively locking double shift element.

25. The multi-stage transmission of claim 20, wherein the second shift element (20) and the fifth shift element (50) collectively form a common positively locking double shift element.

26. The multi-stage transmission of claim 17, wherein the first transmission element (1.1, 2.1) is a sun gear, the second transmission element (1.2, 2.2) is a planet gear carrier, and the third transmission element (1.3, 2.3) is a ring gear in each of the planetary gear sets (RS1, RS2).

27. The multi-stage transmission of claim 17, wherein at least one of the planetary gear sets (RS1, RS2) is a plus planetary gear set.

28. The multi-stage transmission of claim 27, wherein the second planetary gear set (RS2) is the plus planetary gear set, the first transmission element (2.1) of the second planetary gear set (RS2) is a sun gear, the second transmission element (2.2) of the second planetary gear set (RS2) is a ring gear, and the third transmission element (2.3) of the second planetary gear set (RS2) is a planet gear carrier.

29. The multi-stage transmission of claim 17, wherein the fourth shift element (40) is utilizable as a launch element.

30. The multi-stage transmission of claim 19, wherein the third shaft (3), the fourth shaft (4), the fifth shaft (5), or the sixth shaft (6) is utilizable as a further drive shaft, the further drive shaft operatively connectable by a separating clutch to a further drive.

31. A powershift-capable multi-stage transmission of planetary design, in particular for a combustion-engine-powered and/or electric-motor-powered drive of a motor vehicle, having gear ratio stages for multiple forward gear ratios and a reverse gear ratio, comprising: a drive shaft (1) which is also a first shaft; an output shaft (2) which is also a second shaft; two planetary gear sets (RS1, RS2) which are coupled or coupleable to one another and which each have at least a first transmission element (1.1, 2.1), a second transmission element (1.2, 2.2) and a third transmission element (1.3, 2.3); and multiple shift elements (10, 20, 30, 40, 50, 60, 70) which are assigned to the planetary gear sets (RS1, RS2) and the selective shifting of which gives rise to a transmission ratio, corresponding to the respective gear ratio stages, between the drive shaft (1) and the output shaft (2), wherein at least two of the shift elements (10, 20, 30, 40, 50, 60, 70) are dog-clutch shift elements.

32. The multi-stage transmission of claim 31, wherein at least three of the shift elements (10, 20, 30, 40, 50, 60, 70) are brakes by which the first transmission element (1.1, 2.1), the second transmission element (1.2, 2.2) or the third transmission element (1.3, 2.3) of the planetary gear sets (RS1, RS2) can be braked directly or indirectly against a component (G) fixed with respect to a housing.

33. The multi-stage transmission of claim 31, wherein three of the shift elements (10, 20, 30, 40, 50, 60, 70) are closed in each of the multiple forward gear ratio stages and the reverse gear ratio.

34. The multi-stage transmission of claim 31, wherein: the first transmission element (1.1) of the first planetary gear set (RS1) is connected rotationally fixedly to a third shaft (3), the second transmission element (1.2) of the first planetary gear set (RS1) is connected rotationally fixedly to the drive shaft (1) and the third transmission element (1.3) of the first planetary gear set (RS1) is connected rotationally fixedly to a fourth shaft (4); and the first transmission element (2.1) of the second planetary gear set (RS2) is connected rotationally fixedly to a fifth shaft (5), the second transmission element (2.2) of the second planetary gear set (RS2) is connected rotationally fixedly to the fourth shaft (4) and the third transmission element (2.3) of the second planetary gear set (RS2) is connected rotationally fixedly to a sixth shaft (6).

35. The multi-stage transmission of claim 34, wherein: the third shaft (3) is operatively connectable by a first shift element (10) of the shift elements (10, 20, 30, 40, 50, 60, 70) to a component (G) fixed with respect to a housing; the fourth shaft (4) is operatively connectable by a second shift element (20) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the component (G) fixed with respect to the housing; the sixth shaft (6) is operatively connectable by a third shift element (30) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the component (G) fixed with respect to the housing; the drive shaft (1) is operatively connectable by a fourth shift element (40) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fifth shaft (5); the output shaft (2) is operatively connectable by a fifth shift element (50) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fourth shaft (4) and/or by a sixth shift element (60) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the sixth shaft (6); and the third shaft (3) is operatively connectable by a seventh shift element (70) of the shift elements (10, 20, 30, 40, 50, 60, 70) to the fifth shaft (5).

36. The multi-stage transmission of claim 35, wherein: six forward gear ratios are selectively engageable; the third shift element (30), the fourth shift element (40) and the fifth shift element (50) are closed in a first forward gear ratio of the six forward gear ratios; the third shift element (30), the fifth shift element (50) and the seventh shift element (70) are closed in a second forward gear ratio of the six forward gear ratios; the fourth shift element (40), the fifth shift element (50) and the seventh shift element (70) are closed in a third forward gear ratio of the six forward gear ratios; the first shift element (10), the fourth shift element (40) and the fifth shift element (50) are closed in a fourth forward gear ratio of the six forward gear ratios; the first shift element (10), the fourth shift element (40) and the sixth shift element (60) are closed in a fifth forward gear ratio of the six forward gear ratios; and the first shift element (10), the sixth shift element (60) and the seventh shift element (70) are closed in a sixth forward gear ratio of the six forward gear ratios.

37. The multi-stage transmission of claim 35, wherein one reverse gear ratio is selectively engageable, the second shift element (20), the fourth shift element (40) and the sixth shift element (60) being closed in the one reverse gear ratio.

38. The multi-stage transmission of claim 35, wherein one or more of the second shift element (20), the third shift element (30) and the fifth shift element (50) is a dog-clutch shift element.

39. The multi-stage transmission of claim 35, wherein the second shift element (20) and the third shift element (30) collectively form a common positively locking double shift element.

40. The multi-stage transmission of claim 35, wherein the second shift element (20) and the fifth shift element (50) collectively form a common positively locking double shift element.

41. The multi-stage transmission of claim 31, wherein the first transmission element (1.1, 2.1) is a sun gear, the second transmission element (1.2, 2.2) is a planet gear carrier, and the third transmission element (1.3, 2.3) is a ring gear in each of the planetary gear sets (RS1, RS2).

42. The multi-stage transmission of claim 31, wherein at least one of the planetary gear sets (RS1, RS2) is a plus planetary gear set.

43. The multi-stage transmission of claim 42, wherein the second planetary gear set (RS2) is the plus planetary gear set, the first transmission element (2.1) of the second planetary gear set (RS2) is a sun gear, the second transmission element (2.2) of the second planetary gear set (RS2) is a ring gear, and the third transmission element (2.3) of the second planetary gear set (RS2) is a planet gear carrier.

44. The multi-stage transmission of claim 31, wherein the fourth shift element (40) is utilizable as a launch element.

45. The multi-stage transmission of claim 34, wherein the third shaft (3), the fourth shaft (4), the fifth shaft (5), or the sixth shaft (6) is utilizable as a further drive shaft, the further drive shaft operatively connectable by a separating clutch to a further drive.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Exemplary embodiments of the invention are described in detail in the following drawings. All of the described features and/or features illustrated in the figures form the subject matter of the present invention individually or in any meaningful combination, even independently of the combination thereof in the claims or the back-references thereof. Components that are the same or similar are labeled using the same reference characters. In the drawings, the following is shown:

[0039] FIG. 1 shows an embodiment of a powershift-capable multi-stage transmission, for example for a combustion-engine-powered drive of a motor vehicle, with two minus planetary gear sets and with an output shaft, situated coaxially with respect to the drive shaft, in a schematic illustration,

[0040] FIG. 2 is a table showing an overview of possible gear ratios that is engageable by the multi-stage transmission according to FIG. 1, and the shift elements that have to be actuated for these,

[0041] FIG. 3 shows a further embodiment of a powershift-capable multi-stage transmission, for example for a combustion-engine-powered drive of a motor vehicle, with two minus planetary gear sets and with an output shaft, arranged axially offset with respect to a drive shaft, in a schematic illustration, and

[0042] FIG. 4 shows a modification of the multi-stage transmission according to FIG. 3, in which the second planetary gear set is a plus planetary gear set, in a schematic illustration.

DETAILED DESCRIPTION

[0043] Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example, features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

[0044] FIG. 1 showsin a schematic illustrationa possible embodiment of a powershift-capable multi-stage transmission 100, which may be used for example in a drivetrain of a motor vehicle. The multi-stage transmission 100 has a drive shaft 1 as first shaft and an output shaft 2 as second shaft. The drive shaft 1 is arranged at the transmission input side and is a transmission input shaft. The output shaft 2 is arranged at the transmission output side and is a transmission output shaft.

[0045] The drive shaft 1 may be connected in terms of drive or connectable in terms of drive to a drive machine (not illustrated in FIG. 1), such as a combustion engine or an electric machine, for example may be rotationally fixedly connected to an output shaft of the drive machine. The drive machine may also have a hybrid drive with a combustion engine and an electric machine, wherein the combustion engine and the electric machine are connectable in terms of drive to the drive shaft 1. The direction of action, resulting from the coupling of the drive machine to the drive shaft 1, for the power flow introduced into the multi-stage transmission 100 and the power flow emerging from the multi-stage transmission 100 is indicated by the arrows A and B.

[0046] The multi-stage transmission 100 is of planetary design with only two planetary gear sets, and has a first planetary gear set RS1 and a second planetary gear set RS2, which may, for example, be arranged within a common housing. Each planetary gear set RS1 and RS2 has a first transmission element 1.1 and 2.1 respectively, a second transmission element 1.2 and 2.2 respectively, and a third transmission element 1.3 and 2.3 respectively.

[0047] The multi-stage transmission 100 has seven, preferably a total of seven, shift elements, specifically a first shift element 10, a second shift element 20, a third shift element 30, a fourth shift element 40, a fifth shift element 50, a sixth shift element 60 and a seventh shift element 70, the selective shifting of which gives rise to a transmission ratio, corresponding to the respective gear ratio stages, between the drive shaft 1 and the output shaft 2. The shift elements 10, 20, 30, 40, 50, 60 and 70 and the planetary gear sets RS1 and RS2 are arranged relative to one another in the following manner.

[0048] With regard to the first planetary gear set RS1, the first transmission element 1.1 is connected rotationally fixedly to a third shaft 3, the second transmission element 1.2 is connected rotationally fixedly to the drive shaft 1, and the third transmission element 1.3 is connected rotationally fixedly to a fourth shaft 4. With regard to the second planetary gear set RS2, the first transmission element 2.1 is connected rotationally fixedly to a fifth shaft 5, the second transmission element 2.2 is connected rotationally fixedly to the fourth shaft 4, and the third transmission element 2.3 is connected rotationally fixedly to a sixth shaft 6.

[0049] To realize the seven gear ratio stages, three of the shift elements 10, 20, 30, 40, 50, 60, 70, specifically the first shift element 10, the second shift element 20 and the third shift element 30 are brakes, by which the first transmission element 1.1 or 2.1 or the second transmission element 1.2 or 2.2 or the third transmission element 1.3 or 2.3 of the planetary gear sets RS1 and RS2 respectively can be braked directly or indirectly against a component G fixed with respect to a housing. For this purpose, the third shaft 3 is operatively connectable, in particular rotationally fixedly connectable, by the first shift element 10, the fourth shaft 4 is operatively connectable, in particular rotationally fixedly connectable, by the second shift element 20 and the sixth shaft 6 is operatively connectable, in particular rotationally fixedly connectable, by the third shift element 30 in each case to the component G fixed with respect to a housing or to a component fixed with respect to a housing. The component G fixed with respect to a housing is a component connected fixedly to the housing of the multi-stage transmission, or is an integral constituent part of the housing itself.

[0050] Furthermore, the drive shaft 1 is operatively connectable, in particular rotationally fixedly connectable, by the fourth shift element 40 to the fifth shaft 5, the output shaft 2 is operatively connectable, in particular rotationally fixedly connectable, by a fifth shift element 50 to the fourth shaft 4 or by the sixth shift element 60 to the sixth shaft 6. Furthermore, the third shaft 3 is operatively connectable, in particular rotationally fixedly connectable, by the seventh shift element 70 to the fifth shaft 5. The fourth shift element 40, the fifth shift element 50, the sixth shift element 60 and the seventh shift element 70 thus each act relative to rotatable components, and thus serve as clutches.

[0051] The second shift element 20 and/or the third shift element 30 and/or the fifth shift element 50 are preferably positively locking shift elements, for example dog-clutches, or shift elements subjected to low dynamic load, such as, for example, belt brakes. As a shift element subjected to low dynamic load, basically any frictionally locking shift element is possible which is not capable of friction work.

[0052] In this respect, the shift element may also be a dry clutch which has, for example, a steel-on-steel friction pairing.

[0053] The second shift element 20 and the third shift element 30 may be a common double shift element. By actuating the double shift element, either the second shift element 20 can be closed or the third shift element 30 can be closed. The double shift element preferably also has a neutral position in which then neither the second shift element nor the third shift element 30 is closed.

[0054] Furthermore, the second shift element 20 and the fifth shift element 50 may be realized in one common double shift element. This double shift element may also have a neutral position such that, in a first position, the second shift element 20 is closed and the fifth shift element 50 is still open, in a second shift position, the second shift element 20 is open and the fifth shift element 50 is closed, and in a third shift position, specifically the neutral position, the second shift element 20 and the fifth shift element 50 are open.

[0055] The fourth shift element 40 may be utilized as a launch element. Alternatively, an additional launch element, for example a torque converter, a dry clutch or a wet clutch, may be separately provided, which is positioned upstream of the planetary gear sets RS1, RS2. Provision may furthermore be made for a hybrid head to be positioned upstream of the planetary gear sets RS1 and RS2, which hybrid head is operatively connectable for example by a separating clutch to one of the planetary gear sets RS1 and RS2. The hybrid head may be provided by an electric machine or some other drive other than a combustion engine.

[0056] In the embodiment of the multi-stage transmission 100 as per FIG. 1, the first planetary gear set RS1 and the second planetary gear set RS2 are minus transmissions. For this purpose, in each case, the first transmission element 1.1 or 2.1 is a sun gear, the second transmission element 1.2 or 2.2 is a planet gear carrier, particularly a carrier, and the third transmission element 1.3 or 2.3 is a ring gear.

[0057] Furthermore, the multi-state transmission 100 is suitable for a drivetrain running continuously in a vehicle longitudinal direction. For this purpose, the drive shaft 1 and the output shaft 2 are arranged coaxially with respect to one another. The arrangement of the planetary gear sets RS1 and RS2 relative to one another is preferably such that, in an axial direction with respect to the drive shaft 1 and proceeding from the drive shaft 1, the sequence second planetary gear set RS2, first planetary gear set RS1 is provided.

[0058] FIG. 2 is a table showing an overview of possible gear ratios that are selectively engageable with the multi-stage transmission 100, and showing the shift combinations to be implemented for this purpose with regard to the first shift element 10, the second shift element 20, the third shift element 30, the fourth shift element 40, the fifth shift element 50, the sixth shift element 60 and the seventh shift element 70. According thereto, of the seven available gear ratio stages, six gear ratio stages as forward gear ratios and one gear ratio stage as reverse gear ratio are selectively engageable.

[0059] The gear ratios or gear ratio stages are specified in the first column of the overview. The forward gear ratios are denoted by 1, 2, 3, 4, 5, 6 and the reverse gear ratio is denoted by R. In following columns, the positions of the first shift element 10, of the second shift element 20, of the third shift element 30, of the fourth shift element 40, of the fifth shift element 50, of the sixth shift element 60 and of the seventh shift element 70 associated with each gear ratio are indicated, wherein each shift element 10 and 20 and 30 and 40 and 50 and 60 and 70 is assigned a separate column. Crosses indicate that the respectively associated shift element 10 or 20 or 30 or 40 or 50 or 60 or 70 is present in a closed shift position.

[0060] As can be seen from FIG. 2, in each case, three shift elements are closed in a respective gear ratio stage. The first forward gear ratio is engaged by closing the third shift element 30, the fourth shift element 40 and the fifth shift element 50, the second forward gear ratio is engaged by closing the third shift element 30, the fifth shift element 50 and the seventh shift element 70, the third forward gear ratio is engaged by closing the fourth shift element 40, the fifth shift element 50 and the seventh shift element 70, the fourth forward gear ratio is engaged by closing the first shift element 10, the fourth shift element 40 and the fifth shift element 50, the fifth forward gear ratio is engaged by closing the first shift element 10, the fourth shift element 40 and the sixth shift element 60, and the sixth forward gear ratio is engaged by closing the first shift element 10, the sixth shift element 60 and the seventh shift element 70. The reverse gear ratio is engaged by closing the second shift element 20, the fourth shift element 40 and the sixth shift element 60.

[0061] FIG. 3 shows a further possible embodiment of a powershift-capable multi-stage transmission 200. Components of the multi-stage transmission 200 which are identical or functionally identical to components of the multi-stage transmission 100 as per FIG. 1 are denoted by the same reference designations; in this respect, reference is made to the description relating to the multi-stage transmission 100 as per FIG. 1.

[0062] The multi-stage transmission 200 as per FIG. 2 differs from the multi-stage transmission 100 as per FIG. 1 in that the multi-stage transmission 200 is suitable for front-transverse installation or rear-transverse installation in a motor vehicle. For this purpose, the drive shaft 1 and the output shaft 2 are arranged axially offset with respect to one another. The arrangement of the planetary gear sets RS1 and RS2 relative to one another is preferably such that, in an axial direction with respect to the drive shaft 1 and proceeding from the drive shaft 1, the sequence first planetary gear set RS1, second planetary gear set RS2 is provided.

[0063] FIG. 4 shows a multi-stage transmission 200 which is modified in relation to the multi-stage transmission 200 as per FIG. 3. The modification consists in that the multi-stage transmission 200 as per FIG. 4 has a planetary gear set which is a plus transmission or plus planetary gear set. In the multi-stage transmission 200 as per FIG. 4, the second planetary gear set RS2 is a plus transmission. In this case, the first transmission element 2.1 is a sun gear, the second transmission element 2.2 is a ring gear, and the third transmission element 2.3 is a planet gear carrier, particularly a carrier. The first planetary gear set RS1 isas in the multi-stage transmission 200 as per FIG. 3a minus transmission. There, the first transmission element 1.1 is a sun gear, the second transmission element 1.2 is a planet gear carrier, particularly a carrier, and the third transmission element 1.3 is a ring gear.

[0064] The multi-stage transmissions 100, 200 and 200 described in the above figures may be operated in accordance with the engagement sequence matrix as per FIG. 2 and as described above with regard to FIG. 1.

[0065] The multi-stage transmissions 100, 200 and 200 have in each case two planetary gear sets and seven shift elements, of which three shift elements are utilized as brakes and the remaining four shift elements are utilized as clutches and of which in each case three shift elements must be shifted simultaneously in order to engage a gear ratio. Furthermore, the multi-stage transmissions 100, 200 and 200 each have six forward gear ratios and one reverse gear ratio.

[0066] Modifications and variations can be made to the embodiments illustrated or described herein without departing from the scope and spirit of the invention as set forth in the appended claims.

REFERENCE DESIGNATIONS

[0067] 1 Drive shaft (first shaft) [0068] 2 Output shaft (second shaft) [0069] 3 Third shaft [0070] 4 Fourth shaft [0071] 5 Fifth shaft [0072] 6 Sixth shaft [0073] RS1 First planetary gear set [0074] RS2 Second planetary gear set [0075] 1.1 First transmission element of the first planetary gear set [0076] 1.2 Second transmission element of the first planetary gear set [0077] 1.3 Third transmission element of the first planetary gear set [0078] 2.1 First transmission element of the second planetary gear set [0079] 2.2 Second transmission element of the second planetary gear set [0080] 2.3 Third transmission element of the second planetary gear set [0081] 10 First shift element [0082] 20 Second shift element [0083] 30 Third shift element [0084] 40 Fourth shift element [0085] 50 Fifth shift element [0086] 60 Sixth shift element [0087] 70 Seventh shift element [0088] 100 Multi-stage transmission [0089] 200 Multi-stage transmission [0090] 200 Multi-stage transmission [0091] G Housing, component fixed with respect to a housing [0092] A Arrow [0093] B Arrow