Powershift transmission of a motor vehicle

Patent metadata

Field	Value
Publication number	US-12000461-B2
Application number	US-202217882892-A
Country	US
Kind code	B2
Filing date	Aug 8, 2022
Priority date	Aug 17, 2021
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A powershift transmission of a motor vehicle has a split group with a plurality of powershift stages. An input shaft can be rotatably driven by a drive shaft of a motorized drive and transmits rotational movement in a stepped-up manner to an output shaft of the split group corresponding to one of several powershiftable stage transmissions. The powershiftable stage transmissions can be rotatably driven in a stepped-up manner by the output shaft of the split group via an intermediate group located therebetween, and via an input shaft of a synchromesh transmission group having a plurality of gear stages. A vehicle axle transmission can be rotatably driven by the output shaft of the synchromesh transmission group. The intermediate group has a multiple powershift intermediate transmission, in which each switching position the input shaft of the synchromesh transmission group can be rotatably driven by means of an associated transmission.

First claim

The invention claimed is:

1. A powershift transmission of a motor vehicle having a motorized drive, the powershift transmission comprising:
a split group with a plurality of powershift stages, an input shaft, and an output shaft, the input shaft configured to be rotatably driven by a drive shaft of the motorized drive, wherein the split group transmits rotational movement in a stepped-up manner to the output shaft of the split group, the rotational movement corresponding to one of the plurality of powershift stages;
a synchromesh transmission group having a plurality of gear stages, an input shaft, and an output shaft;
an intermediate group having an output shaft and an input shaft, the intermediate group positioned between the synchromesh transmission group and the split group, wherein the synchromesh transmission group is configured to be rotatably driven in a stepped up manner by the output shaft of the intermediate group, the output shaft of the intermediate group is parallel to the input shaft of the intermediate group;
an axle transmission configured to be rotatably driven by the output shaft of the synchromesh transmission group; and
wherein the intermediate group has a multiple powershift intermediate transmission, and in each switching position, the input shaft of the synchromesh transmission group can be rotatably driven by an associated transmission of the multiple powershift intermediate transmission.

2. The powershift transmission of claim 1 , wherein the split group has one or more powershift forward stage transmissions.

3. The powershift transmission of claim 2 , wherein the split group has one or more powershift reverse stage transmissions.

4. The powershift transmission of claim 1 , wherein the split group has one or more powershift reverse stage transmissions.

5. The powershift transmission of claim 1 , wherein the multiple powershift intermediate transmission has a plurality of clutches which are in each case associated with a switching position of the multiple powershift intermediate transmission.

6. The powershift transmission of claim 5 , wherein the clutches are non-positive-locking clutches and/or frictionally engaging clutches.

7. The powershift transmission of claim 1 , wherein a portion of the plurality of powershift stages of the split group can be rotatably driven directly by the drive shaft of the motorized drive via the input shaft of the split group, and another portion of the plurality of powershift stages of the split group can be rotatably driven by the input shaft of the split group via a transmission.

8. The powershift transmission of claim 3 , wherein a portion of the plurality of powershift stages of the split group can be rotatably driven directly by the drive shaft of the motorized drive via the input shaft of the split group, and another portion of the plurality of powershift stages of the split group can be rotatably driven by the input shaft of the split group via a transmission.

9. The powershift transmission of claim 8 , wherein a portion of the powershift forward stage transmissions of the split group can be rotatably driven directly by the drive shaft of the motorized drive by means of a first input shaft of the split group and another portion of the powershift forward stage transmissions of the split group can be rotatably driven by the input shaft of the split group via the transmission, and wherein a second input shaft of the powershift reverse stage transmissions of the split group can be rotatably driven by means of a second transmission by the drive shaft of the motorized drive.

10. The powershift transmission of claim 1 , wherein the intermediate group has two gear stages, and each of the two gear stages of the intermediate group has an idler gear that is supported on- and rotatable with respect to the input shaft of the intermediate group.

11. The powershift transmission of claim 1 , wherein the intermediate group has two gear stages, and each of the two gear stages of the intermediate group has a fixed gear that is fixed to the output shaft of the intermediate group such that each of the fixed gears rotates in unison with the output shaft of the intermediate group.

12. The powershift transmission of claim 1 , wherein the intermediate group has first and second gear stages and first and second switching elements, wherein engagement of the first switching element drivably couples the input and the output shafts of the intermediate group to each other via only the first gear stage, and wherein engagement of the second switching element drivably couples the input and the output shafts of the intermediate group to each other via only the second gear stage.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Haas Michael
• Dankesreiter Martin
• Eder Anton
• Pauli Thomas
• Spiessl Thomas
• Oberbuchner Thomas
• Igl Stefan
• Landshuter Simone

Classifications

• F16H3/006 Primary

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

• F16H2003/0931

  each countershaft having an output gear meshing with a single common gear on the output shaft · CPC title

• F16H3/093 Primary

  with two or more countershafts · CPC title

• F16H2003/0935

  with multiple countershafts comprising only one idle gear and one gear fixed to the countershaft · CPC title

• F16H2037/045

  comprising a separate gearing unit for shifting between high and low ratio range · CPC title