GEARBOX APPARATUS FOR A DRIVE TRAIN OF A MOTOR VEHICLE

Abstract

Gearbox apparatus for a drive train of a motor vehicle, having at least two electric machines which are assigned to a common gearbox device, the at least two electric machines being arranged in parallel and being arranged together with an electronics device, designed in particular for the electrical supply of the two electric machines, so as to overlap in the axial direction at least in portions in a common spatial volume.

Claims

1. A Gearbox apparatus for a drive train of a motor vehicle, comprising: a common gearbox device; at least two electric machines arranged in parallel and overlapping in an axial direction at least in some portions in a common spatial volume and which are assigned to the common gearbox device; and an electronics device configured to electrically supply the at least two electric machines.

2. The gearbox apparatus according to claim 1, wherein the electronics device is configured to be removable.

3. The gearbox apparatus according to claim 1, wherein: the electronics device is arranged outside a gearbox housing and delimiting an oil chamber of the common gearbox device; at least one maintenance opening, configured to be closed by a maintenance flap formed in the gearbox housing, through which at least one connection element, by which the electronics device is connected to the at least two electric machines, is accessible.

4. The gearbox apparatus according to claim 1, wherein at least one connection element of the electronics device and of the at least two electric machines are arranged in the common spatial volume, in a same axial plane.

5. The gearbox apparatus according to claim 4, wherein the at least one connection element is guided through an electronics housing of the electronics device and a gearbox housing in a sealed manner.

6. The gearbox apparatus according to claim 1, wherein the at least two electric machines are designed similarly or differently, and/or in that output sides of the at least two electric machines are oriented identically or oppositely.

7. The gearbox apparatus according to claim 1, wherein connection elements of the at least two electric machines are arranged on a same axial side.

8. The gearbox apparatus according to claim 1, wherein at least one oil feed is guided in at least one rotor shaft of one of the at least two electric machines.

9. The gearbox apparatus according to claim 1, wherein at least one sensor, configured as a rotor angle sensor, is arranged at an end of a rotor shaft of one of the at least two electric machines.

10. The gearbox apparatus according to claim 1, wherein the electronics device is configured to be removeably connected to the at least two electric machines by detachable connection elements.

11. The gearbox apparatus according to claim 9, wherein the at least one sensor, is plugged in from an outside.

12. A motor vehicle comprising; a gearbox apparatus for a drive train of the motor vehicle, comprising: a common gearbox device; at least two electric machines arranged in parallel and overlapping in an axial direction at least in some portions in a common spatial volume and which are assigned to the common gearbox device; and an electronics device configured to electrically supply the at least two electric machines.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention will be explained below by exemplary embodiments with reference to the figures. The figures are schematic representations and show:

[0025] FIG. 1 is a gearbox diagram of a gearbox apparatus;

[0026] FIG. 2 is an axial view of the gearbox diagram from FIG. 1;

[0027] FIG. 3 is a perspective view of a first electric machine of the gearbox apparatus from FIGS. 1 and 2;

[0028] FIG. 4 is a longitudinal section of the electric machine from FIG. 3;

[0029] FIG. 5 is a perspective view of a second electric machine of the gearbox apparatus from FIGS. 1 and 2; and

[0030] FIG. 6 is a longitudinal section of the electric machine from FIG. 5.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

[0031] FIG. 1 shows a gearbox apparatus 1 for a drive train, not shown in greater detail, for a motor vehicle. The gearbox apparatus 1 comprises two electric machines 2, 3 which are assigned to a common gearbox device 4. The two electric machines 2, 3 shown are merely to be understood as examples. Likewise, a different orientation or arrangement of the electric machines 2, 3 is possible. The number of electric machines 2, 3 can also be increased as desired.

[0032] The electric machines 2, 3 are arranged in parallel, i.e. their rotor axes 5, 6 are oriented identically. Here, an output element 7 of the “first” electric machine 2 points in a “first” axial direction, for example in the direction of a gearbox output, and an output element 8 of the “second” electric machine 3 points in a “second” axial direction, i.e. in the opposite axial direction, for example in the direction of a gearbox input. The two electric machines 2, 3 are assigned to the same gearbox device 4, i.e. they can transmit torque to the same output shaft 9. Likewise, the gearbox device 4 can be assigned a wheel set, not shown in greater detail, which both electric machines 2, 3 can use. Here it is possible in particular to operate the electric machines 2, 3 separately or together.

[0033] The gearbox apparatus 1 also has an electronics device 10, for example power electronics, which is designed to supply the electric machines 2, 3 with electrical energy. Here, FIG. 1 shows a common spatial volume 11 in which the two electric machines 2, 3 and the electronics device 10 overlap, i.e. at least one portion of each of the two electric machines 2, 3 and of the electronics device 10 is arranged in the common spatial volume 11. In particular, in this embodiment it is shown that the connection elements 13, for example electrical contacts, of the electronics device 10 are all located in one axial plane 12, i.e. that all connection elements 13 (“bus bars”) are arranged in the axial plane 12, by which connection elements 13 the electronics device 10 is connected to the electric machines 2, 3. Here, as is usual, three connection elements 13 are provided for the supply of each of the two electric machines 2, 3.

[0034] FIG. 2 shows the common spatial volume 11, in particular the axial plane 12 in a schematic cross-sectional view. It is thus evident that the connection elements 13 are all arranged in the same axial plane 12, so that particularly short electrical supply lines can be provided between the electronics device 10 and the electric machines 2, 3. FIG. 2 also shows that the electronics device 10 is arranged outside a gearbox housing 14, namely inside an electronics housing 15. The gearbox apparatus 1 has a maintenance opening here which allows the connection elements 13 to be reached from the outside and in particular the electronics device 10 to be detached from the gearbox housing 14, for example by the connection elements 13 being designed to be detachable, for example screwed or plugged in. Furthermore, further mechanical connection elements can be provided with which the electronics housing 15 is arranged on the gearbox housing 14, for example screws. In particular, these can be sealed in such a way that the interior of the gearbox housing 14 remains oil-tight.

[0035] FIGS. 3 and 4 show the electric machine 2 in a perspective view and in a longitudinal section. It can be seen that the connection elements 13 of the electric machine 2 are arranged on the axial side opposite the direction in which the output element 7 points on the rotor axis 5. For example, the connection elements 13 of the electric machine 2 are arranged on the side of a gearbox input. FIG. 4 shows a longitudinal section of the electric machine 2, wherein an oil feed 16 is provided, which is arranged in the rotor shaft 5 of the electric machine 2.

[0036] FIGS. 5 and 6 show the electric machine 3 in a perspective view and in a longitudinal section. Here the electric machine 3 has the connection elements 13 on the axial side on which the rotor shaft 6 and the output element 8, for example a pinion, are arranged. Since the two electric machines 2, 3, as shown in FIG. 1, are arranged or oriented in opposite directions, i.e. their output elements 7, 8 point in different axial directions, the electric machines 2, 3 have the connection elements 13 at other points on the electric machines 2, 3. In this case, however, the connection elements 13 are arranged on the same axial side, namely in this exemplary embodiment on the side of the output element 8 of the second electric machine 3. The exemplary embodiment shown is merely exemplary in this point. It would also be possible to reverse the arrangement of the connection elements 13 or to arrange the electric machines 2, 3 the other way round or to have both electric machines 2, 3 point in the same axial direction with their output elements 7, 8.

[0037] The electric machine 3 also has an oil feed 16 inside the rotor shaft 6, as shown in FIG. 6. Furthermore, the electric machine 3 has a sensor 17, in particular a rotor angle sensor, which is arranged at the end of the rotor shaft 6 of the electric machine 3. In this exemplary embodiment, the sensor 17 is plugged into the rotor shaft 6 from the outside so that the sensor is accessible from the outside and can be detached or replaced if necessary.

[0038] The details, advantages and features shown in the individual exemplary embodiments are interchangeable, transferable to each other, and combinable with each other.

[0039] Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.