Transmission arrangement of an agricultural or industrial utility vehicle

• US 8,166,837 B2
• Filed: 12/17/2008
• Issued: 05/01/2012
• Est. Priority Date: 12/22/2007
• Status: Active Grant

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Buhrke, Frank
• Primary Examiner(s): PEZZUTO, ROBERT ERIC
• Application Number:
  US12/337,032
• Publication Number:
  US 20090158867A1
• Time in Patent Office: 1,231 Days
• Field of Search: 74/158.2, 74/11, 74/152, 74/154, 74/156, 74/156.6, 74/156.9, 74/158, 74/158.4, 74/158.6, 74/158.8, 746/65.G, 746/65.K, 180/53.8, 180/305, 180/374, 180/376, 180/367, 180/375
• US Class Current: 74/15.82
• CPC Class Codes: B60K 17/28 characterised by arrangement, location, or type of power take-off
• CPC Class Codes: B60K 17/34 for driving both front and rear wheels, e.g. four wheel drive vehicles arrangement or mounting of control devices for changing number of driven wheels B60K23/08
• CPC Class Codes: F16H 3/006 power being selectively transmitted by either one of the parallel flow paths

Abstract

The present invention relates to a transmission arrangement of an agricultural or industrial utility vehicle, in particular of an agricultural tractor. The transmission arrangement comprises a drive transmission, which can be driven by an engine of the utility vehicle, and a PTO transmission. The drive transmission has a rear-axle transmission output for driving a rear axle of the utility vehicle. The drive transmission has a front axle transmission output for driving a front axle of the utility vehicle. The PTO transmission serves to drive an implement adaptable to the utility vehicle. The PTO transmission can be driven via a PTO transmission output of the drive transmission or independently of the drive transmission via a shaft driven by the engine of the utility vehicle. The transmission arrangement according to the invention is characterized in that the PTO transmission can be coupled to the front axle transmission output of the drive transmission, in order to couple the output speed of the PTO transmission to the speed of travel of the utility vehicle.

Claims

1. A transmission arrangement of one of an agricultural and industrial utility vehicle, comprising a drive transmission, driven by an engine of the utility vehicle, and a PTO transmission, the drive transmission having a rear axle transmission output for driving a rear axle of the utility vehicle, the drive transmission having a front axle transmission output for driving a front axle of the utility vehicle, the PTO transmission serving to drive an implement adaptable to the utility vehicle, and the PTO transmission being drivable via one of a PTO transmission output of the drive transmission and independently of the drive transmission via a shaft driven by the engine of the utility vehicle, wherein the PTO transmission is driven by the engine by way of the front axle transmission output of the drive transmission, in order to couple the output speed of the PTO transmission to the speed of travel of the utility vehicle.

2. The transmission arrangement as claimed in claim 1, wherein the PTO transmission has a PTO transmission input, coupled to one of the PTO transmission output of the drive transmission or to the shaft driven by the engine of the utility vehicle.

3. The transmission arrangement as claimed in claim 1, wherein the PTO transmission has a further PTO transmission input, which can be coupled to the front axle transmission output of the drive transmission.

4. The transmission arrangement as claimed in claim 1, wherein the PTO transmission is driven via one of the front axle transmission output of the drive transmission or independently of the drive transmission via a shaft driven by the engine of the utility vehicle.

5. The transmission arrangement as claimed in claim 1, wherein the PTO transmission is driven via one of the front axle transmission output of the drive transmission or the PTO transmission output of the drive transmission.

6. The transmission arrangement as claimed in claim 2, wherein a clutch serves to couple the shaft driven by the engine of the utility vehicle to the PTO transmission input.

7. The transmission arrangement as claimed in claim 2, wherein a clutch serves to couple the PTO transmission output of the drive transmission to the PTO transmission input.

8. The transmission arrangement as claimed in claim 3, wherein a clutch serves to couple the front axle transmission output of the drive transmission to the further PTO transmission input.

9. The transmission arrangement as claimed in claim 6, wherein the clutch is assigned to the PTO transmission input.

10. The transmission arrangement as claimed in claim 6, wherein the clutch is embodied as one of a friction clutch or a positively interlocking clutch.

11. The transmission arrangement as claimed in claim 1, wherein a transmission shifting point is provided, which serves for switching between a PTO transmission driven by the front axle transmission output of the drive transmission or driven by the shaft driven by the engine of the utility vehicle.

12. The transmission arrangement as claimed in claim 1, wherein a transmission shifting point is provided, which serves for shifting between a PTO transmission driven by one of the front axle transmission output of the drive transmission or the PTO transmission output of the drive transmission.

13. The transmission arrangement as claimed in claim 11, wherein the transmission shifting point is assigned to the PTO transmission.

14. The transmission arrangement as claimed in claim 1, wherein the PTO transmission is coupled to the front axle transmission output by a shaft.

15. The transmission arrangement as claimed in claim 14, wherein the shaft is coupled to a part of the front axle transmission output, which is active even when the front axle drive is inoperative.

16. The transmission arrangement as claimed in claim 14, wherein the shaft is coupled to a part of the front axle transmission output, which is active only when the front axle drive is operative.

17. A transmission arrangement of one of an agricultural and industrial utility vehicle, the transmission arrangement comprising a drive transmission, which is driven by an engine of the utility vehicle, and a PTO transmission, the drive transmission having a drive transmission output for driving a vehicle axle of the utility vehicle, the PTO transmission serving to drive an implement adaptable to the utility vehicle, and the PTO transmission being drivable by a shaft via one of a PTO transmission output of the drive transmission and independently of the drive transmission via a shaft driven by the engine of the utility vehicle, wherein the PTO transmission is driven by the engine by way of the drive transmission output of the drive transmission via a further shaft, in order to couple the output speed of the PTO transmission to the speed of travel of the utility vehicle.