Powershift transmission of a motor vehicle

Patent metadata

Field	Value
Publication number	US-11933388-B2
Application number	US-202218050495-A
Country	US
Kind code	B2
Filing date	Oct 28, 2022
Priority date	Nov 3, 2021
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

A powershift transmission has a split group with a plurality of powershift stages and an input shaft that can be rotatably driven by a drive shaft of a motorized drive. The input shaft transmits in a stepped-up manner to an output shaft of the split group a rotational movement corresponding to a selected powershiftable stage transmission. A synchromesh transmission group has at least four gear stages and can be rotatably driven by the output shaft of the split group via an intermediate group located therebetween, and via the output shaft of the synchromesh transmission group an axle transmission of the motor vehicle can be rotatably driven. The intermediate group has first and second switching elements each having an output shaft that can be coupled by means of a switchable clutch to an idler. First and second output gears are arranged on the output shaft of the synchromesh transmission group.

First claim

The invention claimed is:

1. A powershift transmission of a motor vehicle, comprising:
a split group having a plurality of powershift stage, an input shaft, and an output shaft, the input shaft configured to be rotatably driven by a drive shaft of a motorized drive and configured to transmit in a stepped-up manner to the output shaft of the split group a rotational movement corresponding to a selection of one of a plurality of powershiftable stage transmissions; and
a synchromesh transmission group having at least four gear stages configured to be rotatably driven by the output shaft of the split group via an intermediate group located therebetween and via an output shaft of the synchromesh transmission group and via the output shaft of the synchromesh transmission group an axle transmission of the motor vehicle can be rotatably driven
wherein the intermediate group has
a first switching element and a second switching element each having an output shaft, wherein the output shaft of the first switching element configured to be coupled by means of switchable clutches to a first idler or to a second idler, the first idler having a higher number of teeth of a high gear and the second idler having a lower number of teeth of a low gear,
wherein the output shaft of the second switching element is configured to be coupled by means of switchable clutches to a third idler or to a fourth idler, the third idler having a higher number of teeth of a high gear and the fourth idler having a lower number of teeth of a low gear,
a first output gear securely arranged on the output, shaft of the synchromesh transmission group and in which the first idler and the third idler engage,
a second output gear arranged on the output shaft of the synchromesh transmission group and in which the second idler and the fourth idler engage, and
wherein, when the second idler or the fourth idler is coupled by means of the switchable clutches, the second output gear is connectable in a rotationally secure manner to the output shaft of the synchromesh transmission group, and when the first idler or the third idler is coupled, the second output gear is decoupled by a switching apparatus from the output shaft of the synchromesh transmission group.

2. The powershift transmission of claim 1 , wherein the switchable clutches and/or the switching apparatus are at least one of switched magnetically and switched electrohydraulically.

3. The powershift transmission as claimed in claim 2 , wherein the switchable clutches are at least one of non-positive-locking clutches and frictionally engaging clutches.

4. The powershift transmission of claim 1 , wherein the switchable clutches are dual-synchronous clutches which can be switched from a neutral position into a first clutch switching position and a second clutch switching position.

5. The powershift transmission of claim 1 , wherein the second idler is rotatably supported by means of a roller bearing or a plain bearing on the output shaft associated therewith of the intermediate group, and/or the fourth idler is rotatably supported by means of a roller bearing or plain bearing on the output shaft, which is associated therewith, of the intermediate group.

6. The powershift transmission as claimed in claim 5 , wherein the roller bearing of the second idler and/or the roller bearing of the fourth idler is/are a needle bearing.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Haas Michael
• Dankesreiter Martin
• Oberbuchner Thomas
• Pauli Thomas
• Igl Stefan

Classifications

• F16H3/006 Primary

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H3/085

  with more than one output shaft · CPC title

• F16H3/093

  with two or more countershafts · CPC title

• F16H63/3026

  comprising friction clutches or brakes (band brake actuating mechanisms F16H63/3003) · CPC title

• F16H63/3043

  comprising friction clutches or brakes · CPC title