Hydrostatic-mechanical power split transmission
AssigneeZF Friedrichshafen AG
InventorsJurgen Legner, Roland Fischer, Michael Siber
Life of this patent
Estimating the term…
Abstract
A hydrostatic-mechanical power split transmission with at least two continuous operating ranges for use in agricultural and construction machines. The transmission has a summation planetary gear and a clutch for forward drive (7) and a clutch for reverse drive (6) that are arranged upstream of the summation gear. The transmission has a first sun gear (13) and a second sun gear (14) and a ring gear such that the ring gear (15) can be connected to an output drive shaft (22), via a clutch for the first driving range (23), and the second sun gear (14) can be connected to the output drive gear (22), via a clutch for the second operating range (27).
Claims10
A hydrostatic-mechanical power split transmission comprising:
- a drive shaft (1) being connectable to a planet carrier (10) of a summation gear via a forward drive clutch (7), and via a reverse drive clutch (6),
- the summation gear having a first sun gear (13), a second sun gear (14), a ring gear (15), and at least on double planetary gear (12) arranged on the planet carrier (10),
- a first hydraulic unit (17), of a hydraulic transmission branch, being directly connected to the first sun gear (13) in a rotationally fixed manner, and
- a second hydraulic unit (21) of the hydraulic transmission branch being directly connected to a first spur-gear stage, and the first spur-gear stage being directly connected to the ring gear (15),
- the second hydraulic unit (21) being connectable to an output drive shaft (22), via a second spur-gear stage and a first operating range clutch (23), and
- the second sun gear (14) being connectable to the output drive shaft (22) via a third spur-gear stage with a second operating range clutch (27).
A hydrostatic-mechanical power split transmission comprising:
- an input drive shaft (1) being connectable to a planet carrier (10) of a summation gear via a forward drive clutch (7) and via a reverse drive clutch (6),
- the summation gear having a first sun gear (13), a second sun gear (14), at least one double planetary gear (12) arranged on the planet carrier (10), and a ring gear (15),
- a first hydraulic unit (17), of a hydraulic transmission branch, being connected to the first sun gear (13) in a rotationally fixed manner, and
- a second hydraulic unit (21) of the hydraulic transmission branch being connected, via a first spur-gear stage, to the ring gear (15),
- the second hydraulic unit (21) being connectable to an output drive shaft (22), via a second spur-gear stage and a first operating range clutch (23), and
- the second sun gear (14) being connectable to the output drive shaft (22) via a third spur-gear stage with a second operating range clutch (27),
- wherein the second hydraulic unit (21) is connectable to the output drive shaft (22) via a third operating range clutch (33), and the third operating range clutch (33) is arranged coaxially with a unit drive shaft (20) of the second hydraulic unit (21).
A hydrostatic-mechanical power split transmission comprising:
- a drive shaft (1) being connectable to a planet carrier (10) of a summation gear via a forward drive clutch (7) and via a reverse drive clutch (6),
- the summation gear having a first sun gear (13), a second sun gear (14), at least one double planetary gear (12) arranged on the planet carrier (10), and a ring gear (15),
- a first hydraulic unit (17), of a hydraulic transmission branch, being connected to the first sun gear (13) in a rotationally fixed manner, and
- a second hydraulic unit (21) of the hydraulic transmission branch being connected, via a first spur-gear stage, to the ring gear (15),
- the second hydraulic unit (21) being connectable to an output drive shaft (22), via a second spur-gear stage and a first operating range clutch (23),
- the second sun gear (14) being connectable to the output drive shaft (22) via a third spur-gear stage with a second operating range clutch (27),
- the first operating range clutch (23) is arranged coaxially with the output drive shaft (22),
- the output drive shaft (22) drives, via a fourth spur-gear stage (30, 37), an input shaft (38) for driving an axle of a vehicle,
- wherein the vehicle is a work machine, and
- the output drive shaft (22) drives the input shaft (32) of the axle via a fourth spur-gear stage and the output drive shaft (22) is arranged oblique with respect to the drive shaft (1).
Dependencies are inferred from the claim text.