Gearbox and drive unit with such a gearbox

Patent metadata

Field	Value
Publication number	US-12523276-B2
Application number	US-202519042712-A
Country	US
Kind code	B2
Filing date	Jan 31, 2025
Priority date	Feb 2, 2024
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

A gearbox has an input shaft, an output shaft, three shifting elements, and three planetary gearsets each having a sun shaft, ring gear shaft, and web shaft. The first sun shaft, the second sun shaft, and the input shaft are connected rotationally fixed. Rotationally fixed connections are made between the first ring gear shaft and a stationary component, the first web shaft and the second ring gear shaft, the second web shaft and the third sun shaft, and the third web shaft and the output shaft. Closing the first shifting element connects the third ring gear shaft rotationally fixed to a stationary component. Closing the second shifting element connects in a rotationally fixed manner the first web shaft, the second ring gear shaft, the third web shaft, and the output shaft. Closing the third shifting element connects rotationally fixed two of the three shafts of the third planetary gearset.

First claim

The invention claimed is:

1 . A gearbox for a vehicle, comprising:
a drive input shaft for connection to an electric machine; a drive output shaft; a first shifting element, a second shifting element, and a third shifting element a first planetary gearset with a first sun shaft, a first ring gear shaft, and a first web shaft; and a second planetary gearset with a second sun shaft, a second ring gear shaft and a second web shaft; a third planetary gearset with a third sun shaft, a third ring gear shaft, and a third web shaft; wherein the first sun shaft, the second sun shaft, and the drive input shaft are connected rotationally fixed to one another; wherein the first ring gear shaft is connected rotationally fixed to a stationary component; wherein the first web shaft is connected rotationally fixed to the second ring gear shaft; wherein the second web shaft is connected rotationally fixed to the third sun shaft; wherein the third web shaft is connected rotationally fixed to the drive output shaft; wherein in the closed state of the first shifting element a first gear with a first gear ratio is engaged, such that in the first gear the third ring gear shaft is connected rotationally fixed to a stationary component; wherein in the closed state of the second shifting element a second gear with a second gear ratio is engaged, such that in the second gear the first web shaft, the second ring gear shaft, the third web shaft and the drive output shaft are connected rotationally fixed to one another; and wherein in the closed state of the third shifting element a third gear with a third gear ratio is engaged, such that in the third gear two of the three shafts of the third planetary gearset are connected to one another.

2 . The gearbox according to claim 1 , wherein the first shifting element and the third shifting element are combined to form a dual shifting element.

3 . The gearbox according to claim 1 , wherein the second shifting element and the third shifting element are combined to form a dual shifting element.

4 . The gearbox according to claim 1 , wherein all the shifting elements are in the form of interlocking shifting elements.

5 . The gearbox according to claim 1 , wherein in the closed state of the third shifting element the third web shaft is connected rotationally fixed to the third ring gear shaft.

6 . The gearbox according to claim 1 , wherein in the closed state of the third shifting element the third web shaft is connected rotationally fixed to the third sun shaft.

7 . A drive unit for a vehicle, comprising an electric machine and the gearbox according to claim 1 , wherein the electric machine is arranged coaxially with the gearbox.

8 . A drive unit according to claim 7 , comprising:
a differential with a differential input shaft configured for connecting the drive output shaft; and two differential output shafts each configured for connecting to a vehicle wheel.

9 . A vehicle companying at least one drive unit according to claim 7 .

10 . A drive unit for a vehicle, comprising an electric machine and the gearbox according to claim 1 , wherein the electric machine is arranged axis-parallel to the gearbox.

11 . A drive unit according to claim 10 , comprising:
a differential with a differential input shaft configured for connecting the drive output shaft; and two differential output shafts each configured for connecting to a vehicle wheel.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes
• Martin Thomas
• Kutter Fabian
• Glückler Johannes
• Bornträger Kai
• Renner Stefan

Classifications

• F16H2200/2097

  comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing · CPC title

• F16H2200/0021

  specially adapted for electric vehicles · CPC title

• F16H2200/2094

  using positive clutches, e.g. dog clutches · CPC title

• F16H2200/2038

  with three engaging means · CPC title

• F16H2200/201

  with three sets of orbital gears · CPC title