Transmission arrangement, overall transmission and mobile agricultural machine

Patent metadata

Field	Value
Publication number	US-11125309-B2
Application number	US-201615736149-A
Country	US
Kind code	B2
Filing date	May 17, 2016
Priority date	Jun 16, 2015
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

A transmission assembly including a torque input shaft and a torque output shaft and input idler gears, input fixed gears and shift elements, each of which is associated with an input idler gear, are arranged on the torque input shaft, and output idler gears, output fixed gears and shift elements, each of which are associated with an output idler gear, are arranged on the torque output shaft, with the result that a plurality of different torque transmission paths from the torque input shaft to the torque output shaft may be implemented. The transmission arrangement has an additional torque transmission path that may be implemented. The additional torque transmission path runs from the torque input shaft through a double gear to the torque output shaft. The transmission assembly can be included in a corresponding overall transmission which can be installed in an agricultural machine.

First claim

The invention claimed is:

1. An overall transmission for an agricultural machine, the overall transmission comprising:
a splitter transmission;
a transmission assembly comprising a torque input shaft and a torque output shaft;
input idler gears, input fixed gears and shift elements, each of which are associated with an input idler gear, being arranged on the torque input shaft, the input idler gears being rotatable with respect to the torque input shaft, and the input fixed gears being continually rotationally fixed to the torque input shaft;
output idler gears, output fixed gears and shift elements, each of which are associated with an output idler gear, being arranged on the torque output shaft;
the output idler gears and the output fixed gears each meshing with either one of said input idler gears or one of said input fixed gears;
the input idler gears being operably couplable to the torque input shaft via actuation of the shift elements associated with the input idler gears;
the output idler gears being operably couplable to the torque output shaft via actuation of the shift elements associated with the output idler gears, such that a plurality of different torque transmission paths, from the torque input shaft to the torque output shaft, are implementable;
an additional torque transmission path being implementable, and the additional torque transmission path running from the torque input shaft via a double gear to the torque output shaft; and
the double gear either meshing with an additional input idler gear and one of said input fixed gears or meshing with two of said output idler gears.

2. The overall transmission according to claim 1 , wherein the double gear has a first gear ring and a second gear ring, a diameter of the first gear ring, in relation to a diameter of the second gear ring, is designed such that a crawling-like reduction of an input speed occurs when the additional torque transmission path is implemented.

3. The overall transmission according to claim 1 , wherein the additional torque transmission path also extends through an intermediate gear, which is arranged as an idler gear on either the torque input shaft or on the torque output shaft and either meshes with the first gear ring or with the second gear ring of the double gear.

4. The overall transmission according to claim 3 , wherein either one of said input idler gears or one of said output idler gears is utilized as the intermediate gear.

5. The overall transmission according to claim 3 , wherein one of said shift elements, which is associated with either one of said input idler gears or one of said output idler gears that meshes with the intermediate gear, is not synchronizable.

6. The overall transmission according to claim 1 , wherein the double gear axially bridges one of:
at least one of said input idler gears,
at least one of said output idler gears,
at least one of said input fixed gears, and
at least one of said output fixed gears.

7. The overall transmission according to claim 1 , wherein the shift elements associated with the input idler gears are synchronizable and the shift elements associated with the output idler gears are synchronizable.

8. The overall transmission according to claim 1 , wherein at least one gear shift packet, which structurally combines shift elements of at least one of adjacent said input idler gears and adjacent said output idler gears, is arranged on at least one of the torque input shaft and the torque output shaft.

9. The overall transmission according to claim 1 , wherein a first output of the transmission assembly is operatively connectable to a drivable rear axle of a vehicle.

10. The overall transmission according to claim 1 , wherein a second output of the transmission assembly is shiftable via a power shift element.

11. The overall transmission according to claim 10 , wherein the transmission assembly is designed such that the second output has an output speed that differs by a transmission ratio from the first output.

12. The overall transmission according to claim 1 , wherein the overall transmission further comprises a PTO shaft transmission, which has a shared PTO shaft stub for a PTO shaft operation and a ground-speed PTO shaft operation.

13. An agricultural machine in combination with an overall transmission comprising a splitter transmission;
a transmission assembly comprising a torque input shaft and a torque output shaft;
input idler gears, input fixed gears and shift elements, each of which are associated with an input idler gear, being arranged on the torque input shaft, the input idler gears being rotatable with respect to the torque input shaft, and the input fixed gears being continually rotationally fixed to the torque input shaft;
output idler gears, output fixed gears and shift elements, each of which are associated with an output idler gear, being arranged on the torque output shaft;
the output idler gears and the output fixed gears each meshing with either one of said input idler gears or one of said input fixed gears;
the input idler gears being operably couplable to the torque input shaft via actuation of the shift elements associated with the input idler gears;
the output idler gears being operably couplable to the torque output shaft via actuation of the shift elements associated with the output idler gears, such that a plurality of different torque transmission paths from the torque input shaft to the torque output shaft are implementable;
an additional torque transmission path being implementable, the additional torque transmission path running from the torque input shaft via a double gear to the torque output shaft; and
the double gear either meshing with an additional input idler gear and one of said input fixed gears or meshing with two of said output idler gears.

14. An overall transmission for an agricultural machine, the overall transmission comprising:
a splitter transmission and a synchromesh transmission;
the synchromesh transmission comprising:
a one-piece torque input shaft and a torque output shaft, and the torque input shaft being drivingly connected to the splitter transmission;
the torque input shaft of the synchromesh transmission supporting at least first and second input idler gears, at least one input fixed gear, and a first double acting shift element, the first double acting shift element being actuatable, in a first axial direction, to couple the first input idler gear to the torque input shaft and being actuatable, in an opposite second axial direction, to couple the second input idler gear to the torque input shaft, the first and the second input idler gears being rotatable with respect to the torque input shaft, and the at least one input fixed gear being continually rotationally fixed to the torque input shaft;
the torque output shaft of the synchromesh transmission supporting at least first and second output idler gears, at least two output fixed gears, and a second double acting shift element, and the second double acting shift element being actuatable, in a first direction, to couple the first output idler gear to the torque output shaft and being actuatable, in an opposite second axial direction, to couple the second output idler gear to the torque output shaft;
each one of the at least first and the second input idler gears meshing with a respective one of the at least two output fixed gears, and the at least one input fixed gear meshing with one of the first and the second output idler gears;
the first double acting shift element and the second double acting shift element being selectively actuatable to implement a plurality of diff

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Pauli Thomas
• Igl Stefan
• Oberbuchner Thomas
• Haas Michael
• Devoti Marco

Classifications

• F16H2003/0936

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

• F16H2200/0078

  the gear ratio comprising twelve or more forward speeds · CPC title

• F16H2003/0826

  wherein at least one gear on the input shaft, or on a countershaft is used for two different forward gear ratios · CPC title

• F16H2200/0052

  the gear ratios comprising six forward speeds · CPC title

• F16H2200/0004

  comprising a power take off shaft · CPC title