DE102017110460A1 - Drive device for a motor vehicle - Google Patents

Abstract

Drive device for a motor vehicle, comprising a drive machine (1) and a transmission device (2) with a first, second and third planetary gear set (3a, 3b, 3c) each having a plurality of planetary gears (4a, 4b, 4c) and a spur gear differential (5), wherein the Stirnraddifferential (5) is provided to distribute a drive power of the drive machine (1) to a first and second with the Stirnraddifferential (5) operatively connected to the output shaft (6a, 6b).

Description

The invention relates to a drive device with a transmission device for a motor vehicle.

For example, goes from the DE 10 2014 213 142 A1 a drive arrangement for a motor vehicle with a drive motor and a double differential connected thereto. The dual differential comprises a first and a second differential. The introduction of a driving torque in the double differential via a Au ßenrad, which is connected to a planet carrier of the first differential. The first differential comprises the planet carrier, on which a first and a second planetary disc set are rotatably mounted, wherein the planets of the respective planetary gear set mesh with each other in pairs. The planets of the first planetary gear set further meshes with a first ring gear meshing simultaneously with a first planetary gear set of the second differential and thus drivingly connecting the first differential with the second differential. The second differential has, in addition to the first planetary gear set, a second planetary gear set, wherein the two planetary gear sets are rotatably mounted on a common planet carrier of the second differential, and wherein the planets of the two planetary gearsets mesh with each other in pairs.

The object of the present invention is to provide a drive device for a motor vehicle, wherein the drive device is particularly space-saving and highly translatable design.

This object is achieved by a drive device with the features of claim 1. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims of the following description and the accompanying drawings.

• 1 eine vereinfachte schematische Darstellung einer erfindungsgemäßen Antriebsvorrichtung gemäß einem ersten Ausführungsbeispiel, und
• 2 eine vereinfachte schematische Darstellung einer erfindungsgemäßen Antriebsvorrichtung gemäß einem zweiten Ausführungsbeispiel.

Further measures improving the invention will be described in more detail below together with the description of two preferred embodiments of the invention with reference to the two figures. Show it

• 1 a simplified schematic representation of a drive device according to the invention according to a first embodiment, and
• 2 a simplified schematic representation of a drive device according to the invention according to a second embodiment.

According to the 1 and 2 has a respective drive device according to the invention for a - not shown here - motor vehicle a prime mover 1 and a transmission device 2 with a first, second and third planetary gear set 3a . 3b . 3c each with several planetary gears 4a . 4b . 4c on. The drive device is provided for an electrical axle of a motor vehicle. Furthermore, the transmission device also has a spur gear differential 5 on, with the spur gear differential 5 is provided to drive power of the prime mover 1 on a first and second with the spur gear differential 5 Actively connected output shaft 6a . 6b to distribute. The term "operatively connected" is to be understood that two elements may be directly connected to each other, or there are other elements between two elements, for example, one or more gears or shafts. The prime mover 1 is as an electric machine with a stator 16 and a rotor 17 educated. Further, the prime mover 1 coaxial with the transmission device 2 as well as to the two output shafts 6a . 6b arranged, wherein the drive shaft 10 is designed as a hollow shaft and the first output shaft 6a through the drive shaft 10 is guided.

The planet gears 5a of the first planetary gear set 4a are rotatable on a first planetary carrier 7a arranged and radially between a first sun gear 8a and a first ring gear 9a in the tooth mesh. The first sun wheel 8a is non-rotatable with a drive shaft 10 connected. Two meshing gears are provided for transmitting torque and rotational speed from one gear to the other gear. Under a "gear" is for example a sun gear, a ring gear, a planetary gear and a spur gear to understand.

The planet wheels 5b of the second planetary gear set 4b are rotatable on a second planetary carrier 7b arranged and radially between a second sun gear 8b and a second ring gear 9b in the tooth mesh. The second sun wheel 8b is non-rotatable with the first planet carrier 7a connected, wherein the second planet carrier 7b rotatably with the first ring gear 9a connected is.

The planet gears 5c of the third planetary gear set 4c are rotatable on a third planet carrier 7c arranged and radially between a third sun gear 8c and a third ring gear 9c in the tooth mesh. The third sun wheel 8c is non-rotatable with the second planet carrier 7b connected, wherein the third ring gear 9c rotatably with a housing 11 connected is.

Respective spur gears 13a . 13b of the spur gear differential 5 are rotatable on a common differential carrier 12 who with the third planet carrier 7c rotatably connected, stored. The differential carrier 12 is thus as a planet carrier for the spur gears 13a . 13b educated. The spur wheels 13a a first spur gear set 14a stand with a gearing 15a at the first output shaft 6a in meshing, with the spur gears 13b a second spur gear set 14b with a toothing 15b on the second output shaft 6b in mesh. Furthermore, stand the spur gears 13a . 13b both spur gear sets 14a . 14b in pairs with each other in tooth engagement.

According to 1 is the second ring gear 9b rotatably with the third planet carrier 7c connected. In 2 is the second ring gear 9b rotatably with the housing 11 connected.

The respective transmission devices 2 the respective drive device realizes a total translation of approximately 14 to 16 , Further, due to the three substantially identical planetary gear sets 4a . 4b . 4c , each having a translation of about -2 to -3, realized a particularly simple and compact and highly translating transmission structure.

LIST OF REFERENCE NUMBERS

1

prime mover

2

transmission device

3a, 3b, 3c

planetary gear

4a, 4b, 4c

planet

5

spur gear

6a, 6b

output shaft

7a, 7b, 7c

planet carrier

8a, 8b, 8c

sun

9a, 9b, 9c

ring gear

10

drive shaft

11

casing

12

differential carrier

13a, 13b

spur gear

14a, 14b

spur gear

15a, 15b

gearing

16

stator

17

rotor

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102014213142 A1 [0002]

Claims (4)

Drive device for a motor vehicle, comprising a drive machine (1) and a transmission device (2) with a first, second and third planetary gear set (3a, 3b, 3c) each having a plurality of planetary gears (4a, 4b, 4c) and a spur gear differential (5), wherein the spur gear differential (5) is provided to distribute a drive power of the drive machine (1) to a first and second output shaft (6a, 6b) operatively connected to the spur gear differential (5), Wherein the planetary gears (5a) of the first planetary gear set (4a) are rotatably mounted on a first planet carrier (7a) and radially mesh between a first sun gear (8a) and a first ring gear (9a), the first sun gear (8a) rotatably connected to a drive shaft (10) is connected, Wherein the planetary gears (5b) of the second planetary gear set (4b) are rotatably mounted on a second planet carrier (7b) and radially mesh between a second sun gear (8b) and a second ring gear (9b), the second sun gear (8b) rotatably connected to the first planetary carrier (7a) is connected, and wherein the second planetary carrier (7b) rotatably connected to the first ring gear (9a), Wherein the planetary gears (5c) of the third planetary gear set (4c) are rotatably mounted on a third planet carrier (7c) and radially mesh between a third sun gear (8c) and a third ring gear (9c), the third sun gear (8c) rotatably connected to the second planet carrier (7b) is connected, and wherein the third ring gear (9c) rotatably connected to a housing (11), Wherein respective spur gears (13a, 13b) of the spur gear differential (5) are rotatably mounted on a common differential cage (12) which is non-rotatably connected to the third planetary carrier (7c), wherein the spur gears (13a) of a first spur gear set (14a) with a toothing (15a) on the first output shaft (6a) in meshing engagement, further wherein the spur gears (13b) of a second spur gear set (14b) with a toothing (15b) on the second output shaft (6b) are in meshing engagement, and wherein the Spur gears (13a, 13b) of the two spur gear sets (14a, 14b) are paired with each other in tooth engagement. Drive device after Claim 1 , characterized in that the drive machine (1) as an electrical machine with a stator (16) and a rotor (17) is formed, wherein the drive machine (1) coaxial with the transmission device (2) and to the two output shafts (6a, 6b) is arranged, wherein the drive shaft (10) is designed as a hollow shaft and the first output shaft (6a) through the drive shaft (10) is guided. Drive device according to one of the preceding claims, characterized in that the second ring gear (9b) rotatably connected to the third planet carrier (7c) is connected. Drive device according to one of the preceding claims, characterized in that the second ring gear (9b) is non-rotatably connected to the housing (11).

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