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US 7,703,352 B2Granted
Hydrostatic-mechanical transmission
AssigneeZF Friedrichshafen AG
InventorsJurgen Legner, Klaus Baumann, Martin Haffner
Life of this patent
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Abstract
A hydrostatic-mechanical transmission with a radial piston motor (1) which has a crankshaft (2) that drives a spur gear (7) and the crankshaft (2) is rotatably mounted at three bearing points (12, 13, 14).
Claims10
A hydrostatic-mechanical transmission comprising:
- at least one radial piston motor (1) comprising a crankshaft (2) with an eccentric section (3), the crankshaft (2) driving a spur gear (7) and being mounted by first and second bearings (12, 13);
- wherein the crankshaft (2) is rotatably supported by at least the first and the second bearings (12, 13) and a third bearing (14), the second bearing (13) is located between the spur gear (7) and the eccentric section (3) such that the eccentric section (3), the second bearing (13) and the spur gear (7) are all located between the first bearing (12) and the third bearing (14), and
- the transmission has a housing comprising first, second and third transmission housing portions (5, 6, 15), the spur gear (7) and the first bearing (12) are arranged within the first housing portion (15), the second bearing (13), located between the spur gear (7) and the eccentric section (3), is supported by the second housing portion (6), and the third bearing (14) is supported by the third housing portion (5).
The hydrostatic-mechanical transmission according to 1, wherein the second housing portion (6) has a housing wall (16), positioned between the eccentric section (3) and the spur gear (7), which supports the first bearing (13) and cylinders (4) of the radial piston motor (1).
Dependencies are inferred from the claim text.