阅读说明：本技术 机动车的传动装置 (Transmission device for motor vehicle ) 是由 斯特凡·贝克 约翰尼斯·格吕克勒 米夏埃尔·特吕本巴赫 凯·博恩特雷格 彼得·齐默 约翰尼 于 2018-03-26 设计创作，主要内容包括：本发明涉及一种机动车的传动装置(G),其中,传动装置(G)包括传动装置输入端(GW1-A)、传动装置输出端(GW2-A)、五个行星齿轮组(P1、P2、P3、P4、P5)以及六个切换元件(B1、B2、K1、K2、K3、B3),其中,通过有选择地操作六个切换元件(B1、B2、K1、K2、K3、B3)能在传动装置输入端(GW1-A)与传动装置输出端(GW2-A)之间切换出十个前进挡和两个后退挡,本发明还涉及具有这种传动装置(G)的机动车传动系。(The invention relates to a transmission (G) of a motor vehicle, wherein the transmission (G) comprises a transmission input (GW1-A), a transmission output (GW2-A), five planetary gear sets (P1, P2, P3, P4, P5) and six shift elements (B1, B2, K1, K2, K3, B3), wherein ten forward gears and two reverse gears can be shifted between the transmission input (GW1-A) and the transmission output (GW2-A) by selectively operating the six shift elements (B1, B2, K1, K2, K3, B3), and to a motor vehicle transmission having such a transmission (G).)

1. Transmission (G) for a motor vehicle, comprising a transmission input (GW-A) and a transmission output (GW-A), and a first, a second, a third, a fourth and a fifth planetary gear set (P), wherein the planetary gear sets (P, P) each comprise a plurality of elements (E, wherein a first shift element (B), a second shift element (B), a third shift element (K), a fourth shift element (K), a fifth shift element (K) and a sixth shift element (B, K) are provided, by selectively operating the shift elements via the planetary gear set (P), P2, P3, P4, P5) in the case of different gear shifts (1 to 10, R1 and R2) enable different power flow paths between the transmission input (GW1-A) and the transmission output (GW2-A),

it is characterized in that the preparation method is characterized in that,

-the third element (E32) of the second planetary gear set (P2) and the second element (E23) of the third planetary gear set (P3) are connected to one another in a rotationally fixed manner and can be jointly fixed to a rotationally fixed structural element (GG) via the first shift element (B1),

-wherein the first element (E14) of the fourth planetary gear set (P4) is also fixable to the rotationally fixed structural element (GG) by means of the second shift element (B2);

-the transmission input (GW1-a) is connected in a rotationally fixed manner to the first element (E12) of the second planetary gear set (P2), the second element (E22) of which is connected in a rotationally fixed manner to the third element (E34) of the fourth planetary gear set (P4);

-a second element (E24) of the fourth planetary gear set (P4) is connected in a rotationally fixed manner to the transmission output (GW2-a) and can be connected in a rotationally fixed manner via the third shifting element (K1) to a second element (E25) of the fifth planetary gear set (P5), which can also be connected in a rotationally fixed manner by means of the fourth shifting element (K2) to the first element (E14) of the fourth planetary gear set (P4);

-the first element (E13) of the third planetary gear set (P3) is connected in a rotationally fixed manner to the third element (E35) of the fifth planetary gear set (P5), the first element (E15) of the fifth planetary gear set being permanently fixed to a rotationally fixed structural element (GG);

-the third element (E33) of the third planetary gear set (P3) is connectable in a rotationally fixed manner via the fifth switching element (K3) to the second element (E22) of the second planetary gear set (P2) and to the third element (E34) of the fourth planetary gear set (P4); and is

-in the case of the first planetary gear set (P1) there is a first coupling of the first element (E11) of the first planetary gear set (P1) to a rotationally fixed structural element (GG), a second coupling of the second element (E21) of the first planetary gear set (P1) to the transmission input (GW1-a), and a third coupling of the third element (E31) of the first planetary gear set (P1) to the third element (E33) of the third planetary gear set (P3), wherein two of these couplings are present as a permanent rotationally fixed connection, while in the case of the remaining couplings a rotationally fixed connection can be established by means of the sixth switching element (B3; K4).

2. The transmission (G) according to claim 1, characterized in that the second element (E21) of the first planetary gear set (P1) is connected in a rotationally fixed manner to the transmission input (GW1-A), and the third element (E31) of the first planetary gear set (P1) is connected in a rotationally fixed manner to the third element (E33) of the third planetary gear set (P3), while the first element (E11) of the first planetary gear set (P1) can be fixed to a rotationally fixed structural element (GG) by means of the sixth shift element (B3).

3. The transmission (G) according to claim 1, characterized in that the first element (E11) of the first planetary gear set (P1) is fixed to a rotationally fixed structural element (GG), and the third element (E31) of the first planetary gear set (P1) is rotationally fixed in a connected state to the third element (E33) of the third planetary gear set (P3), while the second element (E21) of the first planetary gear set (P1) can be rotationally fixed to the transmission input (GW1-A) by means of the sixth shift element (K4).

4. The transmission (G) according to claim 1, characterized in that the first element (E11) of the first planetary gear set (P1) is fixed to a rotationally fixed structural element (GG) and the second element (E21) of the first planetary gear set (P1) is rotationally fixed in a connected state to the transmission input (GW1-A), while the third element (E31) of the first planetary gear set (P1) is rotationally fixed to the third element (E33) of the third planetary gear set (P3) by means of the sixth shift element (K4).

5. The transmission (G) according to any one of claims 1 to 4, characterized in that a first forward gear (1) can be shifted by operating the first shift element (B1), the fourth shift element (K2) and the fifth shift element (K3), a second forward gear (2.1) can be shifted by operating the first shift element (B1), the second shift element (B2) and the fifth shift element (K3) or a second forward gear (2.2) can be shifted by operating the first shift element (B1), the second shift element (B2) and the sixth shift element (B3 or K4) or a second forward gear (2.3) can be shifted by operating the first shift element (B1), the second shift element (B2) and the third shift element (K1) or a first forward gear (B1), The second shifting element (B2) and the fourth shifting element (K2) can be shifted into a second forward gear (2.4), the third forward gear (3) can be shifted by actuating the second shifting element (B2), the fourth shifting element (K2) and the fifth shifting element (K3), the fourth forward gear (4) can be shifted by actuating the second shifting element (B2), the fourth shifting element (K2) and the sixth shifting element (B3 or K4), the fifth forward gear (5) can be shifted by actuating the second shifting element (B2), the third shifting element (K1) and the sixth shifting element (B3 or K4), the sixth forward gear (6) can be shifted by actuating the second shifting element (B2), the fifth shifting element (K3) and the sixth shifting element (B3 or K4), and the sixth forward gear (6) can be shifted by actuating the third shifting element (K1), the fourth shifting element (K2) and the fifth shifting element (K353825), The fifth shifting element (K3) and the sixth shifting element (B3 or K4) can be shifted into a seventh forward gear (7), a eighth forward gear (8) can be shifted by actuating the fourth shifting element (K2), the fifth shifting element (K3) and the sixth shifting element (B3 or K4), a ninth forward gear (9) can be shifted by actuating the third shifting element (K1), the fourth shifting element (K2) and the sixth shifting element (B3 or K4), a tenth forward gear (10) can be shifted by actuating the third shifting element (K1), the fourth shifting element (K2) and the fifth shifting element (K3), a first reverse gear (R1) can be shifted by actuating the first shifting element (B1), the fourth shifting element (K2) and the sixth shifting element (B3 or K4), and a first reverse gear (R1) can be shifted by actuating the first shifting element (B1), the fifth shifting element (K393832) and the sixth shifting element (B3 or K4), The third shift element (K1) and the fifth shift element (K3) can be shifted into a second reverse gear (R2).

6. The transmission (G) according to one of the preceding claims, characterized in that a first additional gear (Z1) can be shifted by actuating the first shift element (B1), the third shift element (K1) and the sixth shift element (B3 or K4), a second additional gear (Z2) can be shifted by actuating the first shift element (B1), the third shift element (K1) and the fourth shift element (K2), and a third additional gear (Z3) can be shifted by actuating the second shift element (B2), the third shift element (K1) and the fifth shift element (K3).

7. Transmission (G) according to any of the preceding claims, characterized in that each planetary gear set (P, P) is present as a negative planetary gear set, wherein the respective first element (E, E) of each planetary gear set (P, P) is a respective sun gear, the respective second element (E, E) of each planetary gear set (P, P) is a respective planet carrier, and the respective third element (E, E) of each planetary gear set (P, P) is a respective ring gear.

8. A transmission according to any one of the preceding claims, characterised in that each planetary gear set is present as a plus planetary gear set, wherein the respective first member of each planetary gear set is a respective sun gear, the respective second member of each planetary gear set is a respective ring gear and the respective third member of each planetary gear set is a respective planet carrier.

9. Transmission (G) according to any of the preceding claims, characterized in that one or more shift elements (B1, B2, K1, K2, K3, B3; B1, B2, K1, K2, K3, K4) are each realized as a force-locking shift element.

10. Transmission according to any of the preceding claims, wherein the first shift element is realized as a form-locking shift element.

11. Transmission (G) according to one of the preceding claims, characterized in that the transmission input (GW1-a) is coupled in a rotationally fixed manner to a driven auxiliary (PTO).

12. Transmission (G) according to one of the preceding claims, characterized in that the transmission input (GW1-A) is configured on a drive shaft (GW1) and the transmission output (GW2-A) is configured on an output shaft (GW2), wherein the drive shaft (GW1) and the output shaft (GW2) are arranged coaxially to one another.

13. Transmission (G) according to any of the previous claims, characterized in that an Electric Machine (EM) is provided, the rotor (R) of which is coupled with a rotatable structural element.

14. Transmission (G) according to one of the preceding claims, characterized in that a separating clutch (K0) is also provided, via which the transmission input (GW1-A) can be connected in a rotationally fixed manner with a coupling shaft (AN).

15. Automotive drive train comprising a transmission (G) according to one or more of claims 1 to 14.

Technical Field

The invention relates to a transmission for a motor vehicle, comprising a transmission input and a transmission output, and a first, a second, a third, a fourth and a fifth planetary gear set, wherein the planetary gear sets each comprise a plurality of elements, wherein a first, a second, a third, a fourth, a fifth and a sixth shift element are provided, by selectively actuating the shift elements, a power flow guidance is formed between the transmission input and the transmission output by shifting different gears via the planetary gear sets.

Background

In the present case, the transmission is therefore referred to as a multi-gear transmission, i.e. a plurality of different gear ratio relationships can be shifted as gears between the transmission input and the transmission output of the transmission by actuating the respective shift element, wherein this is preferably carried out automatically. Depending on the arrangement of the shift elements, these are clutches or brakes. Such transmissions are used primarily in motor vehicles in order to appropriately implement the traction force supply of the drive machine of the respective motor vehicle in view of various standards.

A transmission is known from KR 20160072696 a, which comprises five planetary gearsets, each of which is formed from a plurality of elements in the form of a sun gear, a planet carrier and a ring gear. Six shift elements are also provided, by selective actuation of which different gears can be formed between the transmission input and the transmission output of the transmission. In general, ten forward gears and one reverse gear can be shifted between the transmission input and the transmission output.

Disclosure of Invention

The object of the present invention is to provide an alternative design for a transmission known from the prior art, which has ten forward gears and one reverse gear between the transmission input and the transmission output.

This object is achieved in accordance with the preamble of claim 1 in combination with the features of the characterizing part. The following dependent claims each reflect advantageous refinements of the invention. Furthermore, in which the transmission according to the invention is applied, is the subject of claim 15.

According to the invention, the transmission comprises a transmission input and a transmission output, and a first, a second, a third, a fourth and a fifth planetary gear set. In this case, the planetary gear sets each comprise a plurality of elements and serve to guide the power flow from the transmission input to the transmission output. Furthermore, six shift elements are provided, which, by selective actuation, produce different power flow paths between the transmission input and the transmission output when different gears are shifted via the planetary gear set.

In the sense of the invention, the transmission input is preferably formed at the end of the drive shaft, via which the drive movement is introduced into the transmission. Within the scope of the invention, a gear output can be defined at the end of the output shaft, via which the variable-speed drive movement according to the respectively shifted gear is guided out of the gear. However, the transmission output can also be formed by the toothing of a gear, on which the variable-speed drive movement can be picked up. Preferably, the transmission input and the transmission output are arranged axially on mutually opposite ends of the transmission.

A "shaft" is understood in the sense of the present invention to mean a rotatable component of a transmission, via which the associated parts of the transmission are connected to one another in a rotationally fixed manner axially and/or radially, or via which such a connection can be established when a corresponding switching element is actuated. The respective shaft can therefore also be present as an intermediate piece, via which the respective component is connected, for example, radially to the transmission output.

"axial" in the sense of the present invention means an orientation in the direction of the transmission input axis along which the planetary gear sets are arranged coaxially with respect to one another. "radial" is then understood to mean the orientation of the shaft in the direction of the diameter of the shaft on the axis of the input end of the transmission.

The planetary gear sets are preferably arranged in the axial direction in the order of the first planetary gear set, the second planetary gear set, the third planetary gear set, the fourth planetary gear set and the fifth planetary gear set. In principle, however, other arrangements can also be used within the scope of the invention.

At the present time, the present invention includes the following technical teachings: the third element of the second planetary gear set is connected to the second element of the third planetary gear set in a rotationally fixed manner and can be fastened jointly to the rotationally fixed component via the first shifting element, and the first element of the fourth planetary gear set can also be fastened to the rotationally fixed component by means of the second shifting element. The transmission input is also connected in a rotationally fixed manner to a first element of a second planetary gear set, the second element of which is connected in a rotationally fixed manner to a third element of a fourth planetary gear set. The second element of the fourth planetary gear set is connected in a rotationally fixed manner to the transmission output and can be connected in a rotationally fixed manner to the second element of the fifth planetary gear set via a third shifting element, and the second element of the fifth planetary gear set can be connected in a rotationally fixed manner to the first element of the fourth planetary gear set by means of a fourth shifting element. Furthermore, the first element of the third planetary gear set is connected in a rotationally fixed manner to a third element of a fifth planetary gear set, which is permanently fixed to the rotationally fixed component. The third element of the third planetary gear set is connected in a rotationally fixed manner via a fifth shift element to the second element of the second planetary gear set and to the third element of the fourth planetary gear set. Finally, in the case of the first planetary gear set, there is also a first coupling of the first element of the first planetary gear set to the rotationally fixed component, a second coupling of the second element of the first planetary gear set to the transmission input, and a third coupling of the third element of the first planetary gear set to the third element of the third planetary gear set, wherein two of these couplings can be present as a permanent rotationally fixed connection, while the remaining couplings can be brought into a rotationally fixed connection by means of a sixth shifting element.

In other words, in the transmission according to the invention, the third element of the second planetary gear set and the second element of the third planetary gear set are therefore permanently connected to one another in a rotationally fixed manner, while a permanently rotationally fixed connection also exists between the second element of the second planetary gear set and the third element of the fourth planetary gear set. Likewise, the first element of the third planetary gear set is permanently connected to the third element of the fifth planetary gear set in a rotationally fixed manner, while the first element of the fifth planetary gear set is permanently fixed to a rotationally fixed structural element. The transmission input is also permanently connected in a rotationally fixed manner to the first element of the second planetary gear set, and the second element of the fourth planetary gear set is permanently connected in a rotationally fixed manner to the transmission output.

By actuating the first shifting element, the third element of the second planetary gear set and the second element of the third planetary gear set are jointly fixed to the anti-rotation component, and the first element of the fourth planetary gear set can also be fixed to the anti-rotation component by closing the second shifting element. The structural elements of the second switching element that are resistant to relative rotation can also be implemented separately. Closing the third shift element results in a rotationally fixed connection of the second element of the fifth planetary gear set to the second element of the fourth planetary gear set and thus to the transmission output. In addition, the second element of the fifth planetary gear set can also be connected in a rotationally fixed manner to the first element of the fourth planetary gear set by actuating the fourth shifting element. The fifth shift element connects the second element of the second planetary gear set and the third element of the fourth planetary gear set together with the third element of the third planetary gear set in the closed state.

In the transmission according to the invention, in the case of the first planetary gear set, there are three couplings of the elements of the first planetary gear set. The first coupling is therefore in the form of a first element of the first planetary gear set and a rotationally fixed structural element, while in the case of the second element of the first planetary gear set there is a second coupling to the transmission input. The third coupling then exists in the form of the third member of the first planetary gear set and the third member of the third planetary gear set. Two of the three couplings mentioned above are realized as permanent, rotationally fixed connections, while the remaining couplings exist as connections which can only be established rotationally fixed by closing the sixth switching element.

In the sense of the present invention, "coupled" is to be understood as meaning a connection which either exists as a permanent, rotationally fixed connection or can be established rotationally fixed only by actuating the respective switching element.

According to the invention, the anti-rotation structural element of the transmission is a permanently stationary part of the transmission, preferably a transmission housing or a part of such a transmission housing, or a part which is firmly connected to the transmission housing. The first element of the fifth planetary gear set is connected in a rotationally fixed manner to the rotationally fixed component and is therefore permanently stationary. Likewise, the third element of the second planetary gear set and the second element of the third planetary gear set can be jointly used and the first element of the fourth planetary gear set can be held stationary by actuating the respective associated shift element.

According to the invention, the first and second shift elements are designed as brakes which, under control, brake the respective rotatable part or the rotatable parts of the transmission connected to one another in a rotationally fixed manner to a stationary state and are fixed to the rotationally fixed structural element. The third, fourth and fifth shift elements are in the form of clutches, which are actuated to adapt the respective associated rotatable components of the transmission to one another in terms of their rotational movement and are then connected to one another in a rotationally fixed manner. Depending on which coupling of the first planetary gear set is the establishment of a connection against rotation via the sixth shifting element, the sixth shifting element is a brake or a clutch.

Preferably, the first shifting element is arranged axially between the third planetary gear set and the fourth planetary gear set, while the second shifting element is arranged in particular on the side of the fifth planetary gear set facing away from the transmission input and toward the transmission output. Furthermore, the third shifting element and the fourth shifting element are preferably arranged axially in common between the fourth planetary gear set and the fifth planetary gear set and further preferably axially next to one another. In addition, the third and fourth switching elements are arranged here substantially at the same radial level. Based on this spatial arrangement of the third and fourth switching elements, a common supply of the two switching elements is considered here. The fifth shifting element is preferably located axially between the first planetary gear set and the second planetary gear set.

According to the invention, the respective rotationally fixed connection of the rotatable elements of the planetary gear set is preferably realized via one or more intermediate shafts, which can also be present here as short axial and/or radial intermediate pieces, in the case of spatially compact positions of the elements. In particular, the elements of the planetary gear set which are permanently connected to one another in a rotationally fixed manner can each be present either as individual components which are connected to one another in a rotationally fixed manner or in one piece. In the latter case, the individual elements and the possibly present shaft are then formed by a common component, wherein this is achieved in particular only when the individual elements are in spatial proximity to one another in the transmission.

In the case of elements of the planetary gear set which are connected to one another in a rotationally fixed manner only by actuation of the respective shift element, the connection is likewise effected via one or more intermediate shafts.

In general, the transmission according to the invention is characterized by a compact design, low component loads, good gearing efficiency and low transmission losses.

According to an embodiment of the invention, the second element of the first planetary gear set is connected in a rotationally fixed manner to the transmission input, and the third element of the first planetary gear set is connected in a rotationally fixed manner to the third element of the third planetary gear set, while the first element of the first planetary gear set can be fixed to the rotationally fixed component by means of the sixth shifting element.

In this case, the second element of the first planetary gear set is therefore permanently connected in a rotationally fixed manner to the transmission input, and the third element of the first planetary gear set is connected in a rotationally fixed manner to the third element of the third planetary gear set, while the first element of the first planetary gear set is fixed to the rotationally fixed component only by actuating the sixth shifting element. In this case, the sixth shifting element is preferably located axially on the side of the first planetary gear set facing the transmission input.

According to an alternative embodiment of the invention, the first element of the first planetary gear set is fixed to a rotationally fixed component, and the third element of the first planetary gear set is connected in a rotationally fixed manner to the third element of the third planetary gear set. The second element of the first planetary gear set can be connected in a rotationally fixed manner to the transmission input by means of a sixth shifting element.

In this variant, the first element of the first planetary gear set is permanently fixed to the rotationally fixed structural element, while the third element of the first planetary gear set is permanently connected in a rotationally fixed manner to the third element of the third planetary gear set. By closing the sixth shifting element, the second element of the first planetary gear set is connected in a rotationally fixed manner to the transmission input. In this case, the sixth shifting element is preferably located axially between the first planetary gear set and the second planetary gear set and is further preferably arranged axially adjacent to and radially within the fifth shifting element.

According to a further alternative embodiment of the invention, the first element of the first planetary gear set is fixed to the rotationally fixed component, while the second element of the first planetary gear set is connected in a rotationally fixed manner to the transmission input. The third element of the first planetary gear set can be connected in a rotationally fixed manner to the third element of the third planetary gear set by means of a sixth shift element.

In this case, the first element of the first planetary gear set is therefore in turn permanently fixed to the rotationally fixed structural element, and the second element of the first planetary gear set is continuously connected in a rotationally fixed manner to the transmission input, whereas a rotationally fixed connection of the third element of the first planetary gear set to the third element of the third planetary gear set can only be established by closing the sixth shifting element. The sixth shifting element is preferably located axially in the gear plane of the first planetary gear set and is therefore arranged substantially at the same axial level as the first planetary gear set and radially around the first planetary gear set.

In the above-described variant of the transmission according to the invention, ten forward gears and two reverse gears can be achieved by selectively closing in each case three shift elements. In this case, the first forward gear is shifted by actuating the first, fourth and fifth shift elements, while the second forward gear is formed by closing the first, second and fifth shift elements. Alternatively, however, the second forward gear can also be assumed by closing the first, second and sixth shift elements or by actuating the first, second and third shift elements or by actuating the first, second and fourth shift elements. Furthermore, a third forward gear is achieved by actuating the second, fourth and fifth shift element, while a fourth forward gear can be shifted by actuating the second, fourth and sixth shift element. The fifth forward gear can also be assumed by closing the second, third and sixth shifting elements, wherein the second, fifth and sixth shifting elements are operated to shift into the sixth forward gear. While a seventh forward gear is attained by actuation of the third, fifth and sixth shifting element, a shift to an eighth forward gear is possible by actuation of the fourth, fifth and sixth shifting element. A shift into the ninth forward gear is possible by operating the third, fourth and sixth shifting elements, while a shift into the tenth forward gear is effected by closing the third, fourth and fifth shifting elements.

A first reverse gear is attained by actuating the first, fourth and sixth shifting elements, while a second reverse gear is shifted by closing the first, third and fifth shifting elements.

By suitable selection of the fixed-axis transmission ratios of the planetary gear sets, a transmission ratio sequence suitable for use in the automotive field is achieved. For the sequential shifting of the forward gears according to their sequence, the state of each of the two shift elements is always changed by opening one shift element that is involved in the preceding forward gear and closing the other shift element that is used to assume the subsequent forward gear. This can then also lead to a very smooth inter-gear shift.

Advantageously, in the transmission according to the invention, reverse gear can be achieved for driving via a drive machine placed upstream of the transmission. This can be implemented as an alternative or in addition to the arrangement of the electric machine in the transmission, in order to still be able to realize a reverse drive of the motor vehicle in the event of a failure of the electric machine.

In a development of the invention, a first additional gear can be shifted by actuating the first, third and sixth shifting elements, a second additional gear can be shifted by actuating the first, third and fourth shifting elements, and a third additional gear can be shifted by actuating the second, third and fifth shifting elements. These additional gears can also be present in the above-described variants of the transmission according to the invention.

In a further embodiment of the invention, each planetary gear set is present as a negative planetary gear set, wherein the respective first element of each planetary gear set is a respective sun gear, the respective second element of each planetary gear set is a respective planet carrier, and the respective third element of each planetary gear set is a respective ring gear. The minus planetary gear set is formed in a manner known in principle to the person skilled in the art from the elements sun gear, planet carrier and ring gear, wherein the planet carrier carries at least one, but preferably a plurality of planet gears which mesh with the sun gear and the ring gear in each case. Of the five planetary gear sets, one or more planetary gear sets are designed as such negative planetary gear sets. However, it is particularly preferred that all planetary gear sets are present as negative planetary gear sets, as a result of which a particularly compact design can be achieved.

Alternatively or additionally, the individual planetary gear sets are present as spur planetary gear sets, wherein the respective first element of the individual planetary gear set is then the respective sun gear, the respective second element of the individual planetary gear set is the respective ring gear and the respective third element of the individual planetary gear set is the respective planet carrier. In a planetary gearset, there are also elements such as a sun gear, a ring gear and a planet carrier which carries at least one planetary gear pair, one of the planetary gears being in toothed engagement with the internal sun gear and the other planetary gears being in toothed engagement with the surrounding ring gear and the planetary gears meshing with one another. In the transmission according to the invention, one or more planetary gear sets can be embodied as such a positive planetary gear set.

If the connection of the individual elements is permitted, the negative planetary gear set can be converted into a positive planetary gear set, wherein then, in contrast to the embodiment as a negative planetary gear set, the ring gear and the planet carrier are connected to each other and the respective fixed-axis transmission ratio is increased by one. Conversely, the positive planetary gear set can also be replaced by a negative planetary gear set, as long as the connection of the elements of the transmission makes this possible. In this case, the ring gear and the planet carrier are likewise switched relative to one another in comparison with the positive planetary gear set, and the respective fixed-axis transmission ratio is reduced by one. However, as already mentioned above, preferably all planetary gear sets are embodied as negative planetary gear sets.

According to a further embodiment of the invention, the one or more shift elements are each designed as a force-locking shift element (kraftschl ü ssig), which has the advantage that they can be shifted even under load, so that the change between gears can be carried out without interruption of the tractive force, but it is particularly preferred if the first shift element is designed as a form-locking shift element (formschl ü ssig), such as a claw clutch or an inertia synchronizer, because the first shift element takes part in the presentation of the first two forward gears and the two reverse gears, so that the engagement is carried out in the parking state of the motor vehicle.

In a further development of the invention, the input of the transmission is coupled to the output of the auxiliary drive in a rotationally fixed manner. In this case, the transmission according to the invention is therefore equipped with a secondary driven end via which the driving of an auxiliary aggregate or the like can take place. The countershaft can in this case be connected directly to the transmission input of the transmission, but it is preferably connected in a rotationally fixed manner to the second element of the first planetary gear set. More preferably, the auxiliary output is located axially between the first planetary gear set and the transmission input.

According to a further embodiment of the invention, the transmission input is formed on the drive shaft and the transmission output is formed on the output shaft, wherein the drive shaft and the output shaft are coaxial to one another. In this case, the transmission input is preferably arranged at an axial end of the transmission, while the transmission output is designed axially at the opposite end of the transmission. This arrangement is particularly suitable for use in a motor vehicle having a drive train oriented in the direction of travel of the motor vehicle. Alternatively, however, the transmission output can also be oriented transversely to the transmission input in order to realize a configuration which is suitable for a drive train oriented transversely to the direction of travel of the motor vehicle. The gear output can be formed by a toothing which engages with a toothing of a shaft whose axis is arranged parallel to the gear input axis. On this shaft an axle differential can then be arranged which drives the axle.

In a development of the invention, an electric motor is provided, the rotor of which is coupled in a rotationally fixed manner to one of the rotatable components of the transmission. Preferably, the stator of the electric machine is then connected in a rotationally fixed manner to a rotationally fixed component of the transmission, wherein the electric machine can be operated in the form of an electric motor and/or a generator in order to perform different functions. In particular, electric-only driving, boosting via the electric machine, braking and regeneration in the transmission via the electric machine, and/or synchronization can be achieved in this case. The rotor of the electric machine can be arranged coaxially with the respective structural element or offset from the latter, in which case the coupling can be effected via one or more intermediate gear ratio stages, for example in the form of spur gear stages or traction means transmissions such as chain transmissions.

However, the rotor of the electric machine is preferably coupled in a rotationally fixed manner to the transmission input, wherein a purely electric drive of the motor vehicle is thus suitably provided. More preferably, one or more of the switching elements are used as an internal starting element for electric driving. In this case, the first shift element, the fourth shift element or the fifth shift element are particularly suitable for this purpose, since they are each closed in one of the reverse gears and the first forward gear. As a further alternative, however, a separate starting clutch can also be used, which is positioned between the electric machine and the transmission gear set.

In order to drive purely electrically, one of the gears in the transmission is shifted, wherein, in this case, reverse travel of the motor vehicle is also possible in the forward gear by the motor taking in a reverse rotational movement, so that the motor vehicle travels in reverse at the gear ratio of the respective forward gear. As a result, the transmission ratio of the forward gear can be used for both the electric forward running and the electric reverse running. However, the rotor of the electric machine can also be connected to one of the other rotatable components of the transmission, in addition to the transmission input.

According to a further embodiment of the invention, which is realized in particular in conjunction with the above-described electric machine arrangement, a separating clutch is also provided, via which the transmission input can be connected in a rotationally fixed manner to the coupling shaft. The coupling shaft is then used for connection to a drive machine in a drive train of a motor vehicle. The advantage of providing a separating clutch here is that the connection to the drive machine can be interrupted during purely electric driving, so that the drive machine is not interlocked. The separating clutch is preferably designed as a force-locking shift element, for example a diaphragm clutch, but a form-locking shift element, for example a dog clutch or an inertia synchronizer, can also be advantageously present.

In principle, a starting element, for example a hydrodynamic torque converter or a friction clutch, can be connected upstream of the transmission. Such a starting element can then also be a component of the transmission and be used for the design of the starting process in such a way that it enables a slip speed between the internal combustion engine and the transmission input of the transmission. In this case, one of the shift elements of the transmission or a possibly present separating clutch can also be designed as the starting element in such a way that it is present as a friction shift element. In addition, an overrunning clutch (freelauf) can in principle be arranged on each shaft of the transmission, which leads to the transmission housing or to another shaft.

The transmission according to the invention is in particular part of a drive train of a motor vehicle and is then arranged between a drive machine, in particular designed as an internal combustion engine, of the motor vehicle and further components of the drive train which follow in the direction of the power flow to the drive wheels of the motor vehicle. In this case, the transmission input of the transmission is either permanently coupled in a rotationally fixed manner to a crankshaft of the internal combustion engine or can be connected to the crankshaft via an intermediate separating clutch or a starting element, wherein a torsional vibration damper can additionally be provided between the internal combustion engine and the transmission. On the output side, the transmission is then preferably coupled within the drive train of the motor vehicle to an axle transmission of a drive axle of the motor vehicle, wherein, however, there can also be a connection to a longitudinal differential via which a distribution to a plurality of drive axles of the motor vehicle is effected. In this case, the axle gear or the longitudinal differential can be arranged together with the gear in a common housing. Likewise, a torsional vibration damper can also be integrated into the housing.

In the sense of the present invention, two components of a transmission are "connected" or "coupled" in a rotationally fixed manner or "connected to one another" in such a way that they are permanently connected to one another, so that they cannot rotate independently of one another. In this connection, no shift element is provided between the elements of the planetary gear set or structural elements of the shaft or of the rotationally fixed structural element of the transmission, but the respective structural elements are rigidly coupled to one another.

If a shift element is provided between two components of the transmission, these components are not permanently coupled to one another in a rotationally fixed manner, but rather are coupled in a rotationally fixed manner only by actuating the shift element located in the middle. In the sense of the present invention, operating a switching element means here that the relevant switching element is transferred into the closed state and therefore the structural elements directly coupled thereto are subsequently adapted to one another with respect to their rotational movement. In the case of a shift element of this type which is designed as a form-locking shift element, the structural elements which are directly connected to one another in a rotationally fixed manner via the shift element operate at the same rotational speed, whereas in the case of a non-positive shift element, after the shift element has been actuated, a rotational speed difference always exists between the structural elements. Nevertheless, within the scope of the invention, this desired or undesired state is still referred to as a rotationally fixed connection of the respective component via the switching element.

The invention is not limited to the specified combinations of features of the independent claims or their dependent claims. Furthermore, it is also possible to combine the individual features of the claims, the following description of a preferred embodiment of the invention or the figures directly with one another. The claims should not limit their protective scope by using reference signs to the figures.

Drawings

In the drawings, there are shown advantageous embodiments of the invention which will be described below. Wherein:

fig. 1 shows a schematic view of a motor vehicle drive train in which a transmission according to the invention is applied;

fig. 2 shows a schematic view of a transmission according to a first embodiment of the invention;

fig. 3 shows a schematic representation of a transmission according to a second possible embodiment of the invention;

fig. 4 shows a schematic view of a transmission according to a third embodiment of the invention;

fig. 5 shows a schematic representation of a transmission according to a fourth design possibility of the invention;

fig. 6 shows a schematic view of a transmission according to a fifth embodiment of the invention; and

fig. 7 shows an exemplary shift diagram of the transmission of fig. 2 to 6.

Detailed Description

Fig. 1 shows a schematic representation in which an internal combustion engine VKM is connected to a transmission G via an intermediate torsional vibration damper TS. On the output side, an axle gear AG is connected downstream of the gear G, via which the drive power is distributed to the drive wheels DW of the drive axle of the motor vehicle. The transmission G and the axle transmission AG can be combined in a common transmission housing, into which the torsional vibration damper TS can then also be integrated. Fig. 1 also shows that the internal combustion engine VKM, the torsional vibration damper TS, the transmission G and the axle transmission AG are oriented in the direction of travel of the motor vehicle.

Fig. 2 shows a schematic illustration of a transmission G according to a first embodiment of the invention. As can be seen, the transmission G includes a first planetary gear set P1, a second planetary gear set P2, a third planetary gear set P3, a fourth planetary gear set P4, and a fifth planetary gear set P5. Each of the planetary gear sets P1, P2, P3, P4 and P5 has a respective first element E11 or E12 or E13 or E14 or E15, a respective second element E21 or E22 or E23 or E24 or E25 and a respective third element E31 or E32 or E33 or E34 or E35. In this case, the respective first element E11 or E12 or E13 or E14 or E15 is always formed by the sun gear of the respective planetary gear set P1 or P2 or P3 or P4 or P5, while the respective second element E21 or E22 or E23 or E24 or E25 in the planetary gear sets P1, P2, P3, P4 and P5 is respectively present as a respective planet carrier. The respective third element E31 or E32 or E33 or E34 or E35 is formed by the respective ring gear of the respective planetary gear set P1 or P2 or P3 or P4 or P5.

In the present case, the planetary gear sets P1, P2, P3, P4 and P5 are each designed as a negative planetary gear set, wherein the respective planet carrier rotatably guides one, but preferably a plurality of planet gears, each of which is in toothed engagement with a radially inner sun gear and a surrounding ring gear.

However, if docking is permitted, one or more of the planetary gear sets P1, P2, P3, P4, and P5 can also be implemented as positive planetary gear sets. In the case of a spur planetary gear set, the planet carrier then carries at least one planetary gear pair, of which one planetary gear is in toothed engagement with the radially inner sun gear and one planetary gear is in toothed engagement with the radially outer ring gear, and the planetary gears of the gear pairs mesh with one another. In contrast to the respective embodiment as a negative planetary gear set, the respective second element E21 or E22 or E23 or E24 or E25 must then be formed by the respective ring gear, and the respective third element E31 or E32 or E33 or E34 or E35 must then be formed by the respective planet carrier, and the respective fixed-axis transmission ratio is increased by one in order to convert into a positive planetary gear set.

In the present case, first planetary gear set P1, second planetary gear set P2, third planetary gear set P3, fourth planetary gear set P4 and fifth planetary gear set P5 are arranged axially between transmission input GW1-a and transmission output GW2-a in the order of first planetary gear set P1, second planetary gear set P2, third planetary gear set P3, fourth planetary gear set P4 and fifth planetary gear set P5.

Transmission input GW1-A and transmission output GW2-A are disposed coaxially with one another on opposite axial ends of transmission G. In this case, the transmission input GW1-a in the drive train of the motor vehicle of fig. 1 is used for connection to the internal combustion engine VKM, while the transmission G is connected to the subsequent axle transmission AG at the transmission output GW 2-a.

As can be seen from fig. 2, the transmission G comprises a total of six shift elements in the form of a first shift element B1, a second shift element B2, a third shift element K1, a fourth shift element K2, a fifth shift element K3 and a sixth shift element B3. In this case, the shift elements B1, B2, K1, K2, K3 and B3 are each designed as force-locking shift elements and are preferably present as membrane-type shift elements. In addition, the third shifting element K1, the fourth shifting element K2 and the fifth shifting element K3 are currently designed as clutches, while the first shifting element B1, the second shifting element B2 and the sixth shifting element B3 are present as brakes.

In the present case, the second element E21 of the first planetary gear set P1 and the first element E12 of the second planetary gear set P2 are connected to one another in a rotationally fixed manner and are jointly connected in a rotationally fixed manner to a drive shaft GW1, which defines a transmission input GW1-a at one axial end. The third element E31 of the first planetary gear set P1 is connected in a rotationally fixed manner to the third element E33 of the third planetary gear set P3, and the second element E23 of this third planetary gear set is connected in a rotationally fixed manner to the third element E32 of the second planetary gear set P2 and can be fastened together with this third element to a rotationally fixed structural element GG by means of a first shifting element B1. The anti-rotation structural element GG is preferably a gear housing of the gear G or a part of such a gear housing.

Furthermore, the first element E13 of the third planetary gear set is connected in a rotationally fixed manner to the third element E35 of the fifth planetary gear set P5, wherein the first element E15 of the fifth planetary gear set P5 is permanently fixed to the rotationally fixed structural element GG. The first element E14 of the fourth planetary gear set P4 can also be fixed to the rotationally fixed structural element GG by closing the second shift element B2, wherein the first element E14 of the fourth planetary gear set P4 can also be connected rotationally fixed to the second element E25 of the fifth planetary gear set P5 by actuating the fourth shift element K2.

In addition to being connected in a rotationally fixed manner to the first element E14 of the fourth planetary gear set P4, the second element E25 of the fifth planetary gear set P5 can also be connected in a rotationally fixed manner to the second element E24 of the fourth planetary gear set P4, which is permanently connected in a rotationally fixed manner to the output shaft GW2, by means of a third shifting element K1. The output shaft GW2 in this case forms the gear output GW2-a at the axial end of the gear G opposite the gear input GW 1-a. Accordingly, closing the third shift element K1 correspondingly also results in the second element E25 of the fifth planetary gear set P5 being connected in a rotationally fixed manner to the output shaft GW 2.

Furthermore, the third element E34 of the fourth planetary gear set P4 is permanently connected in a rotationally fixed manner to the second element E22 of the second planetary gear set P2 and, together with the second element of this second planetary gear set, can be connected in a rotationally fixed manner to the third element E31 of the first planetary gear set P1 and to the third element E33 of the third planetary gear set P3 by closing the fifth shift element K3. Finally, the first element E11 of the first planetary gear set P1 can also be fixed to the rotationally fixed structural element GG via the sixth shift element B3.

The first shift element B1 is located axially between the third planetary gear set P3 and the fourth planetary gear set P4, while the second shift element B2 is arranged axially on the side of the fifth planetary gear set P5 facing the transmission output GW 2-a.

As can also be seen in fig. 2, the third shifting element K1 and the fourth shifting element K2 are jointly disposed axially between the fourth planetary gear set P4 and the fifth planetary gear set P5 and are directly next to one another axially here. In addition, the third switching element K1 and the fourth switching element K2 are arranged substantially at the same height in the radial direction. Due to the spatial arrangement of the third shift element K1 and the fourth shift element K2, a common supply of the two shift elements K1 and K2 via a common supply line is therefore considered in the transmission G.

The fifth shift element K3 is arranged axially between the first planetary gear set P1 and the second planetary gear set P2, while the sixth shift element B3 is arranged axially on the side of the first planetary gear set P1 facing the transmission input GW 1-a.

Fig. 3 also shows a schematic representation of a transmission G according to a second embodiment of the invention, which transmission here corresponds essentially to the variant described above according to fig. 2. The only difference is that an auxiliary output PTO is additionally provided, which is connected in a rotationally fixed manner to the transmission input GW 1-a. In particular, the auxiliary output side PTO is connected in a rotationally fixed manner to the second element E21 of the first planetary gear set P1, which is also connected in a rotationally fixed manner to the drive shaft GW1 and therefore also to the transmission input GW 1-a. The embodiment of fig. 3 corresponds, furthermore, to the variant described above with reference to fig. 2, so that reference is made to the above.

Fig. 4 shows a schematic representation of a transmission G according to a third embodiment of the invention. This embodiment also corresponds to the variant according to fig. 2 to a large extent, with the difference that the first element E11 of the first planetary gear set B1 is permanently fixed to the rotationally fixed structural element GG, while a rotationally fixed connection between the second element E21 of the first planetary gear set P1 and the drive shaft GW1 is established only by closing the sixth shift element K4. The sixth shifting element K4 is arranged axially between the first planetary gear set P1 and the second planetary gear set P2 and is axially adjacent to the fifth shifting element K3. In addition, the sixth shift element K4 is disposed radially inside the fifth shift element K3, wherein, depending on the spatial arrangement of the shift elements K3 and K4, a common supply is also conceivable here if necessary. In addition, the design option according to fig. 4 corresponds to the variant according to fig. 2, so that reference is made to the above.

Fig. 5 also shows a schematic representation of a transmission G according to a fourth embodiment of the invention, which again largely corresponds to the embodiment according to fig. 4. In contrast, however, the first element E11 of the first planetary gear set P1 is permanently fixed to the rotationally fixed structural element GG, while a rotationally fixed connection of the third element P31 of the first planetary gear set P1 to the third element E33 of the third planetary gear set P3 is established only in the closed state of the sixth shift element K4. The sixth shift element K4 is arranged axially in the gear plane of the first planetary gear set P1 and radially around it. Due to the spatial arrangement in the vicinity of the fifth switching element K3, a common supply of the fifth switching element K3 and the sixth switching element K4 is possible here. In addition, the embodiment according to fig. 5 corresponds to the variant according to fig. 2, so that reference is made to the above.

Finally, fig. 6 shows a schematic view of a transmission G according to a fifth embodiment of the invention. This embodiment also corresponds substantially to the variant according to fig. 2, with the difference that an electric motor EM is additionally provided, the stator S of which is fastened to the rotationally fixed component GG, while the rotor R of the electric motor EM is connected in a rotationally fixed manner to the drive shaft GW 1. Furthermore, the drive shaft GW1 is connected at the transmission input GW1-a via AN intermediate separating clutch K0, which is currently designed as a diaphragm shift element, in a rotationally fixed manner to a coupling shaft AN, which in turn is connected to the crankshaft of the internal combustion engine VKM by means of AN intermediate torsional vibration damper TS. Since the rotor R is connected in a rotationally fixed manner to the drive shaft GW1, the electric motor EM is arranged coaxially with the drive shaft GW 1.

Purely electric driving is possible here via the electric machine EM, wherein in this case the disconnect clutch K0 is disengaged in order to disconnect the transmission input GW1-a from the coupling shaft AN and not to couple the internal combustion engine VKM. In addition, the embodiment according to fig. 6 corresponds to the variant according to fig. 2, so that reference is made to the above.

Fig. 7 shows an exemplary shift diagram of the transmission G from fig. 2 to 6 in tabular form. As can be seen, a total of ten forward gears 1 to 10 and two reverse gears R1 and R2 can be implemented in each case, wherein in each row of the shift diagram which shift element B1, B2, K1, K2, K3 and B3 or K4 is closed in forward gears 1 to 10 and reverse gears R1 and R2 is marked by X. In each of the forward gears 1 to 10 and the reverse gears R1 and R2, three of the shift elements B1, B2, K1, K2, K3 and B3 or K4 are in each case engaged, wherein, when the forward gears 1 to 10 are shifted successively, in addition to the variants 2.2 and 2.3 of the second forward gear, one of the engaged shift elements is disengaged and the other shift element is subsequently engaged.

As can be seen from fig. 7, the first forward gear 1 is shifted by actuating the first shifting element B1, the fourth shifting element K2 and the fifth shifting element K3, wherein, starting from this point on, the second forward gear 2.1 is formed as described above, i.e., the fourth shifting element K2 is opened and the second shifting element B2 is subsequently closed. Alternatively, the shift into the second forward gear 2.2 can also be carried out by opening the fourth shifting element K2 and the fifth shifting element K3 and closing the second shifting element B2 and the sixth shifting element B3 or K4. As a further alternative, the second forward gear 2.3 can also be formed by opening the fourth shifting element K2 and the fifth shifting element K3 and closing the second shifting element B2 and the third shifting element K1. Likewise, starting from the first forward gear 1, the second forward gear 2.4 is attained by opening the fifth shift element K3 and closing the second shift element B2. In this case, it is preferably considered that the forward gears 2.1 and 2.4 are used, since in this case only the shift states of the two shift elements need to be changed relative to the first forward gear 1.

Furthermore, the third forward gear 3 is shifted by closing the second shift element B2, the fourth shift element K2 and the fifth shift element K3. Starting from there, the fourth forward gear 4 is attained by opening the fifth shifting element K3 and closing the sixth shifting element B3 or K4. Subsequently, the fifth forward gear 5 is shifted by opening the fourth shifting element K2 and operating the third shifting element K1, and from this point on, the sixth forward gear 6 is shifted by opening the third shifting element K1 and closing the fifth shifting element K3. Then, to shift into the seventh forward gear 7, the second shift element B2 is opened and the third shift element K1 is closed.

From the seventh forward gear 7 onward, the eighth forward gear 8 is shifted by the third shift element K1 being shifted into the inoperative state and the fourth shift element K2 being shifted into the operative state. To shift further into the ninth forward gear 9, the fifth shift element K3 is then opened and the third shift element K1 is closed. Finally, the ninth forward gear 9 is shifted into the tenth forward gear 10 by shifting the sixth shifting element B3 or K4 into the inoperative state and subsequently shifting the fifth shifting element K3 into the operative state.

By contrast, the first shifting element B1, the fourth shifting element K2 and the sixth shifting element B3 or K4 are engaged to a first reverse gear R1 in which reverse driving of the motor vehicle is possible even when driving via the internal combustion engine VKM. And a second reverse gear R2 is attained by operating the first switching element B1, the third switching element K1 and the fifth switching element K3.

In the transmissions known from fig. 2 to 6, additional gears Z1 to Z3 can also be shown, but they are not well matched to the sequence of gear ratios of the respective transmission G. In this case, a first additional gear Z1 is attained by closing the first shifting element B1, the third shifting element K1 and the sixth shifting element B3 or K4, while a second additional gear Z2 can be assumed by actuating the first shifting element B1, the third shifting element K1 and the fourth shifting element K2. Finally, the third additional gear Z3 can be shifted by closing the second shift element B2, the third shift element K1 and the fifth shift element K3.

As shown in fig. 2 to 6, the first shift element B1 is designed as a force-locking shift element. However, the first shift element B1 can also be realized as a form-locking shift element, for example as an inertia synchronizer or as a dog-type shift element.

Furthermore, the transmission G according to the embodiment of fig. 3 to 5 can also be hybrid-driven similarly to the variant according to fig. 6. In addition, the slave PTO can also be realized in the embodiment according to fig. 4 to 6 in a manner similar to the variant shown in fig. 3.

With the design according to the invention, a transmission with a compact design and good efficiency can be achieved.

List of reference numerals

G-drive

GG anti-relative-rotation structural element

P1 first planetary gear set

E11 first element of first planetary gear set

E21 second element of first planetary gear set

E31 third member of the first planetary gear set

P2 second planetary gear set

E12 first element of second planetary gear set

E22 second element of the second planetary gear set

E32 third member of the second planetary gear set

P3 third planetary gear set

E13 first element of third planetary gear set

E23 second member of third planetary gear set

E33 third member of the third planetary gear set

P4 fourth planetary gear set

E14 first element of fourth planetary gear set

E24 second element of fourth planetary gear set

E34 third member of the fourth planetary gear set

P5 fifth planetary gear set

E15 first element of fifth planetary gear set

E25 second element of fifth planetary gear set

E35 third member of the fifth planetary gear set

B1 first switching element

B2 second switching element

K1 third switching element

K2 fourth switching element

K3 fifth switching element

B3 sixth switching element

K4 sixth switching element

1 first Forward Gear

2.1 second Forward Gear

2.2 second Forward Gear

2.3 second Forward Gear

2.4 second Forward Gear

3 third Forward Gear

4 fourth forward gear

5 fifth Forward Gear

6 sixth Forward Gear

7 seventh forward gear

8 eighth forward gear

9 ninth forward gear

10 tenth forward gear

R1 first reverse gear

R2 second reverse gear

Z1 first additional gear

Z2 second additional gear

Z3 third additional gear

GW1 drive shaft

GW1-A transmission input end

GW2 driven shaft

GW2-A transmission output end

PTO auxiliary driven end

EM motor

S stator

R rotor

AN coupling shaft

K0 disconnect clutch

VKM internal combustion engine

TS torsional vibration damper

AG axle transmission device

DW driving wheel