Powershift multispeed reversing transmission

Patent metadata

Field	Value
Publication number	US-10428905-B2
Application number	US-201715464859-A
Country	US
Kind code	B2
Filing date	Mar 21, 2017
Priority date	Apr 28, 2016
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A powershifting multispeed reversing transmission includes a converter lockup clutch (31) arranged in a space (13) provided by arranging the forward-driving clutch (8) between the fixed gear (5) and the loose gear (7) on a forward-driving shaft, and the reverse-driving clutch (12) between the fixed gear (9) and the loose gear (11) a reverse-driving shaft.

First claim

The invention claimed is:

1. A powershifting multispeed reversing transmission comprising:
an input shaft that can be driven by a drive engine,
the input shaft being in functional connection with a drive shaft that is arranged coaxially and is rotatable about a rotational axis,
a fixed gear being connected to the drive shaft in a rotationally fixed manner,
the fixed gear meshing with a fixed gear that is connected, in a rotationally fixed manner, to a forward-driving shaft and, at the same time, the fixed gear meshing with a fixed gear that is connected, in a rotationally fixed manner, to a reverse-driving shaft,
the forward-driving shaft being connectable in a rotationally fixed manner, via a forward-drive clutch for forward driving, to a loose gear,
the reverse-driving shaft being connectable in a rotationally fixed manner, via a reverse-drive clutch for reverse driving, to a loose gear, and
in a direction of the rotational axis of the drive shaft, the forward-drive clutch being arranged on the forward-driving shaft, between the fixed gear on the forward-driving shaft and the loose gear, and, in the direction of the rotational axis of the drive shaft, the reverse-drive clutch being arranged on the reverse-driving shaft, between the fixed gear and the loose gear such that a fitting space is produced, on the drive shaft, close to the fixed gear in which a converter lockup clutch is accommodable.

2. The powershifting multispeed reversing transmission according to claim 1 , wherein the input shaft is connected to a pump impeller wheel of a hydrodynamic torque converter and the drive shaft is connected to a turbine wheel of the hydrodynamic torque converter, and the converter lockup clutch, for connecting the input shaft to the drive shaft, is arranged on the drive shaft.

3. The powershifting multispeed reversing transmission according to claim 1 , wherein further shafts with respective further clutches are arranged parallel to the drive shaft, and the forward-driving clutch, the reverse-driving clutch and the further clutches facilitate engagement of six gears in a forward driving direction and three gears in a reverse driving direction.

4. The powershifting multispeed reversing transmission according to claim 3 , wherein when the transmission is fitted into a vehicle, the drive shaft is arranged farthest away from a surface on which the vehicle is standing and all of the forward-driving shaft, the reverse-driving shaft and the further shafts are arranged closer to the surface on which the vehicle is supported.

5. The powershifting multispeed reversing transmission according to claim 3 , wherein only one clutch is arranged on each of the shafts.

6. The powershifting multispeed reversing transmission according to claim 2 , wherein a distance between a drive output shaft, for driving the vehicle wheels, and the drive shaft is between 450 mm and 500 mm.

7. The powershifting multispeed reversing transmission according to claim 3 , wherein the transmission is made with the converter lockup clutch for connecting the input shaft to the drive shaft.

8. The powershifting multispeed reversing transmission according to claim 4 , wherein the loose gear that is connectable, via the forward-driving clutch, to the forward-driving shaft in a rotationally fixed manner meshes with a fixed gear which is connected, in a rotationally fixed manner, to a shaft on which a clutch for the fourth gear is arranged.

9. The powershifting multispeed reversing transmission according to claim 8 , wherein two fixed gears and one loose gear are arranged on the shaft on which the clutch for the fourth gear is arranged such that the loose gear meshes with the fixed gear on the forward-driving shaft.

10. The powershifting multispeed reversing transmission according to claim 8 , wherein only one fixed gear and one loose gear are arranged on the shaft on which the clutch for the fourth gear is arranged, and the loose gear meshes with the fixed gear on the forward-driving shaft.

11. A powershifting multispeed reversing transmission comprising:
an input shaft that is drivable by a drive engine and rotatable about a rotational axis;
a drive shaft that is coaxially aligned with the input shaft and rotatable about the rotational axis and the drive shaft is functionally connectable with the input shaft, the drive shaft has a primary fixed gear that is rotationally fixed to the drive shaft so as to prevent relative rotation between the primary fixed gear and the drive shaft;
a forward-driving shaft is rotatable about a first axis and has a first fixed gear, a first loose gear and a first clutch, the first fixed gear is rotationally fixed to the forward-driving shaft so as to prevent relative rotation therebetween, the first loose gear is rotatable with respect to the forward-driving shaft, and the first loose gear is connectable, in a rotationally fixed manner, to the forward-driving shaft by engagement of the first clutch;
a reverse-driving shaft having is rotatable about a second axis and has a second fixed gear, a second loose gear and a second clutch, the second fixed gear is rotationally fixed to the reverse-driving shaft so as to prevent relative rotation therebetween, the second loose gear is rotatable with respect to the reverse-driving shaft, and the second loose gear is connectable in a rotationally fixed, manner to the reverse-driving shaft by engagement of the second clutch;
the primary fixed gear continuously meshes with the first and the second fixed gears, and the first and the second axes of the forward-driving and the reverse-driving shafts, respectively, are parallel to the rotational axis of the drive shaft; and
the first clutch is arranged on the forward-driving shaft axially between the first fixed gear and the first loose gear, and the second clutch is arranged on the reverse-driving shaft axially between the second fixed gear and the second loose gear such that a clutch installation space is produced along the rotational axis adjacent the primary fixed gear in which a further clutch is accommodable.

12. The powershifting multispeed reversing transmission according to claim 11 , wherein the further clutch is arranged in the clutch installation space axially adjacent the primary fixed gear, and the input shaft is connectable, in a rotationally fixed manner, to the drive shaft by engagement of the further clutch.

13. The powershifting multispeed reversing transmission according to claim 1 , wherein the transmission is made without the converter lockup clutch for connecting the input shaft to the drive shaft.

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Regenscheit Norman

Classifications

• F16H47/00

  Combinations of mechanical gearing with fluid clutches or fluid gearing · CPC title

• F16H2200/0091

  the gear ratios comprising three reverse speeds · CPC title

• F16H3/093 Primary

  with two or more countershafts · CPC title

• F16H45/02

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H47/06

  the fluid gearing being of the hydrokinetic type · CPC title