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US 7,814,813 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 having a radial piston motor (1) with a crankshaft (2) which drives a spur gear (7). A transmission housing comprises three housing portions which define two separate spaces. The spur gear arrangement is located in one of the spaces while the radial piston motor is located in the other space.
Claims10
A hydrostatic-mechanical transmission comprising:
- a radial piston motor (1) having cylinders (4) and a crankshaft (2) which powers a drive output via at least one spur gear arrangement (7, 8), the at least one spur gear arrangement (7, 8) and the radial piston motor (1) being arranged in a transmission housing,
- wherein the transmission housing comprises at least first, second and third housing portions (5, 6, 15), the first housing portion (15) and the second housing portion (6) define a first space (21) in which the at least one spur gear arrangement (7, 8) is located, and the cylinders (4) are mounted on a side of both the second housing portion (6) and the third housing portion (5), and the second housing portion (6) and the third housing portion (5) define a second space (22) in which the radial piston motor (1) is located such that the second housing portion (6) is adjacent both the spur gear arrangement (7, 8) and the radial piston motor (1), and
- the third housing portion (5) is connected to a valve housing (19), and
- the valve housing (19) houses a flushing valve (35) through which the pressure medium flows from the radial piston motor (1), through a pressure medium return, into the second space (22).
1 more element
A hydrostatic-mechanical transmission comprising:
- a radial piston motor (1) having cylinders (4) and a crankshaft (2) which supplies driving power to a drive output via at least one spur gear arrangement (7, 8), and the at least one spur gear arrangement (7, 8) and the radial piston motor (1) being arranged in a transmission housing,
- wherein the transmission housing comprises at least first, second and third housing portions (5, 6, 15), the first housing portion (15) and the second housing portion (6) together define a first space (21) in which the at least one spur gear arrangement (7, 8) is located,
- the second housing portion (6) and the third housing portion (5) define a second space (22) in which the radial piston motor (1) is located, and the second housing portion (6) is located between and adjacent both the spur gear arrangement (7, 8) and the radial piston motor (1), and the cylinders (4) are mounted between the second housing portion (6) and the third housing portion (5), and
- the third housing portion (5) is connected with a valve housing (19) which accommodates at least one valve through which pressure medium flows from the radial piston motor (1) into the second space (22).
1 more element
Dependencies are inferred from the claim text.