DRIVE DEVICE

Abstract

A drive device for a motor vehicle, comprising a drive shaft, an at least two-speed manual transmission, a differential and a left and right output shaft, wherein the manual transmission is formed by a planetary gear mechanism, wherein the differential is integrated in the planetary gear mechanism.

Claims

1. Drive apparatus for a motor vehicle, comprising a drive shaft, an at least two-gear manual transmission, a differential and a left-hand and right-hand output shaft, the manual transmission being configured by way of a planetary transmission, the differential being integrated into the planetary transmission.

2. Drive apparatus according to claim 1, wherein the planetary spider of the planetary transmission forms the differential housing of the differential.

3. Drive apparatus according to at least one of the preceding claims, wherein differential gears of the differential are mounted rotatably on the planetary spider of the planetary transmission.

4. Drive apparatus according to at least one of the preceding claims, wherein the planetary transmission is seated together with the differential on the drive shaft, with the result that the planetary transmission, together with the differential, is configured as a common first transmission stage.

5. Drive apparatus according to at least one of the preceding claims, wherein the drive shaft drives the sun gear of the planetary transmission.

6. Drive apparatus according to at least one of the preceding claims, wherein the output of the manual transmission takes place via the planetary spider of the planetary transmission.

7. Drive apparatus according to claim 6, wherein the output of the manual transmission downstream of the planetary spider (6) of the planetary transmission (5) takes place via differential gears (7) and side gears (9) of the differential (2), in particular to a left-hand and a right-hand output spur gear (10, 11).

8. Drive apparatus according to claim 7, wherein the left-hand output spur gear meshes with a left-hand drive spur gear of the left-hand output shaft, and the right-hand output spur gear meshes with a right-hand drive spur gear of the right-hand output shaft, the left-hand and right-hand out-put shaft and the left-hand and right-hand drive spur gear forming a second gear stage of the drive apparatus.

9. Drive apparatus according to at least one of the preceding claims, wherein the internal gear of the planetary transmission can be moved selectively into a first position, in which the internal gear is fixed to the housing, in particular for selecting a first gear of the manual transmission, and can be moved into a second position, in which the internal gear is connected fixedly to the planetary spider so as to rotate with it, with the result that it rotates with the latter as one block, in particular for selecting a second gear of the manual transmission.

10. Drive apparatus according to at least one of the preceding claims, wherein the internal gear of the planetary transmission can be moved selectively into a third position, in which the internal gear is connected neither fixedly to the housing nor to the planetary spider, with the result that a free rotational speed can be set at the internal gear, in particular for selecting a neutral gear of the manual transmission.

11. Drive apparatus according to at least one of the preceding claims, wherein a differential lock is configured be-tween the left-hand and right-hand output shaft, with the result that the left-hand and right-hand output shaft can be coupled fixedly to one another so as to rotate together by way of the differential lock, the differential lock being arranged, in particular, between drive spur gears of the output shafts.

12. Drive apparatus according to at least one of the preceding claims, wherein a differential lock is configured on the differential, with the result that the planetary spider and a side gear of the differential can be coupled fixedly so as to rotate together by way of the differential lock, the differential lock being arranged, in particular, axially next to the differential on the drive axis of the drive apparatus.

13. Drive apparatus according to at least one of the preceding claims, wherein a torque vectoring drive is configured on the differential, it being possible for the torque vectoring drive to be coupled fixedly to the planetary spider and/or an output spur gear so as to rotate with them/it, the torque vec-toring drive being arranged, in particular, axially next to the differential on the drive axis of the drive apparatus.

14. Drive apparatus according to at least one of the preceding claims, wherein the drive apparatus comprises a parking lock, the parking lock being configured in such a way that the planetary spider and/or the sun gear can be blocked by way of the parking lock.

Description

DRAWINGS

[0027] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.

[0028] FIG. 1 is a three-dimensional, partly cut-away depiction of a drive device according to the invention.

[0029] FIG. 2 is a diagrammatic view of a drive device according to the invention from FIG. 1 in a first state, namely in a first gear.

[0030] FIG. 3 is a diagrammatic view of a drive device according to the invention from FIG. 1 in a second state, namely in a second gear.

[0031] FIG. 4 is a diagrammatic view of a drive device according to the invention from FIG. 1 in a third state, namely in a neutral gear.

[0032] FIG. 5 is a diagrammatic view of a drive device according to the invention in an embodiment with a parking lock on the sun gear.

[0033] FIG. 6 is a diagrammatic view of a drive device according to the invention in an embodiment with a parking lock on the differential.

[0034] FIG. 7 is a diagrammatic view of a drive device according to the invention in an embodiment with a differential lock on the output shafts.

[0035] FIG. 8 is a diagrammatic view of a drive device according to the invention in an embodiment with a differential lock on the differential.

[0036] FIG. 9 is a diagrammatic view of a drive device according to the invention in an embodiment with a torque vectoring drive.

DESCRIPTION OF THE INVENTION

[0037] FIG. 1 to FIG. 4 show a drive device according to the invention for a motor vehicle. The drive device comprises a drive motor 18 which drives a drive shaft 1, in particular the rotor shaft of the drive motor 18. A first gear stage of the drive device is formed on this drive shaft 1 and comprises a planetary gear mechanism 5 and a differential 2 which is integrated in the planetary gear mechanism 5.

[0038] The drive shaft 1 directly drives the sun gear 8 of the planetary gear mechanism 5. The sun gear 8 meshes with planet gears 21 which are mounted rotatably on a planet carrier 6. The planet gears 21 in turn mesh with the ring gear 14 of the planetary gear mechanism 5. The output from the first gear stage takes place via the planet carrier 6, which simultaneously forms the differential housing of the differential 2.

[0039] Differential gears 7 of the differential 2 are mounted rotatably on the planet carrier 6. The rotation axis of the differential gears 7 is positioned radially relative to the drive axis 1, and the rotation axis of the planet gears 21 is axially parallel to the drive axis 1. The differential gears 7 mesh with a left and a right side gear 9 of the differential 2, the torque from which is transmitted directly by means of a respective hollow shaft, formed coaxially to the drive axis 1, to a left output spur gear 10 and a right output spur gear 11 of the first gear stage.

[0040] The left output spur gear 10 and the right output spur gear 11 mesh with the drive spur gears 12 and 13 of the second gear stage. The left and right drive spur gears 12, 13 are rotationally fixedly connected to or formed integrally with the left and right output shafts 3 and 4.

[0041] The translation ratio of the first gear stage may be changed by positioning the ring gear 14 in one of three different positions (FIG. 2, FIG. 3, FIG. 4). In particular, a shift collar 20 may be arranged radially outside the ring gear 14 so that by displacing the shift collar 20, a connection of the ring gear 14 can be created either to the housing 19 of the drive device (FIG. 2) or to the planet carrier 6 (FIG. 3) or to neither the housing 19 nor the planet carrier 6 (FIG. 4).

[0042] FIG. 2 shows the drive device in a first gear in which the ring gear 14 is rotationally fixedly connected to the housing 19, i.e. is stationary relative to the housing, so that the rotational speed of the ring gear 14 is set to 0. The translation ratio of the first gear stage then arises from the ratio of the number of teeth of the ring gear to that of the sun gear+1.

[0043] In FIG. 3, the ring gear 14 is connected rotationally fixedly to the planet carrier 6 and rotates as a block, the rotational speed of the ring gear 14 and planet carrier 6 is then equal to the rotational speed of the drive shaft 1.

[0044] In a middle position of the shift collar 20, as shown in FIG. 4, the ring gear 14 is connected neither fixedly to the housing nor to the planet carrier 6. A free rotation speed is therefore set at the planet carrier 6. In this position, no torque is transmitted by the drive shaft 1. This position constitutes a neutral gear of the drive device.

[0045] FIG. 5 and FIG. 6 show embodiments of the drive device with an additionally mounted parking lock 17.

[0046] In FIG. 5, the parking lock is arranged on the sun gear 8 or on the drive shaft 1, so that via a shift collar 20, the drive shaft 1 and the sun gear 8 can be fixedly connected to the housing and hence blocked. A possible second position for both shift collars 20 shown (on the parking lock 17 and on the ring gear) is depicted by dotted lines.

[0047] In the embodiment in FIG. 6, the parking lock 17 is formed on the differential so that the planet carrier 6, which forms the differential cage, can be fixedly connected to the housing and hence blocked.

[0048] FIG. 7 and FIG. 8 show accordingly various arrangements of differential locks 15 for locking the differential 2 in drive devices according to the invention.

[0049] In FIG. 7, a differential lock 15 is formed between the left and right output shafts 3 and 4, so that the two output shafts 3, 4 can be coupled together rotationally fixedly. The differential lock 15 is here arranged space-savingly between the two drive spur gears 12 and 13 of the output shafts.

[0050] FIG. 8 shows an alternative arrangement of a differential lock 15, namely on the differential 2. Here, the planet carrier 6, i.e. the differential cage, and a side gear 9 of the differential 2, can be coupled together rotationally fixedly. The differential lock 15 is arranged axially next to the differential 2 on the drive axis of the drive device, coaxially to the drive shaft 1.

[0051] FIG. 9 finally shows a further embodiment of a drive device according to the invention, which has a torque vectoring drive 16 on the differential 2. The torque vectoring drive 16 has its own drive motor which can be coupled rotationally fixedly to the planet carrier 6 and/or an output spur gear 9, 10. The torque vectoring drive 16 is arranged axially next to the differential 2 on the drive axis of the drive device, i.e. again coaxially to the drive shaft 1.

[0052] According to the invention, naturally any combinations of the embodiments of the drive device shown are possible, for example with parking lock, differential lock and/or torque vectoring drive.

LIST OF REFERENCE DESIGNATIONS

[0053] 1 Drive shaft [0054] 2 Differential [0055] 3 Left output shaft [0056] 4 Right output shaft [0057] 5 Planetary gear mechanism [0058] 6 Planet carrier [0059] 7 Differential gear [0060] 8 Sun gear [0061] 9 Side gear [0062] 10 Left output spur gear [0063] 11 Right output spur gear [0064] 12 Left drive spur gear [0065] 13 Right drive spur gear [0066] 14 Ring gear [0067] 15 Differential lock [0068] 16 Torque vectoring drive [0069] 17 Parking lock [0070] 18 Drive motor [0071] 19 Housing [0072] 20 Shift collar [0073] 21 Planet wheel