Bent-axis machine having minimum non-zero pivot angle
AssigneeWacker Neuson Linz GmbH
InventorsJosef Erlinger, Harald Thumfart, Robert Finzel
Life of this patent
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Abstract
A bent-axis machine comprises a housing having a control cover and a piston drum which is rotatably mounted in the housing on a valve plate and which has axial cylinders, each of which receives a piston. An adjustment system includes a pivot cradle via which the piston drum and the valve plate can be pivoted relative to the drive axis about a maximum working range which is delimited by a minimum pivot angle and a maximum pivot angle. The minimum pivot angle of the working range is shifted out of its zero position by at least 5°, and the maximum pivot angle is extended in the same way by at least 5° in order to retain the entire working range about the region left out of the lower region.
Claims7
A bent-axis machine comprising:
- a housing having a control cover;
- a valve plate;
- a piston drum rotatably mounted in the housing on the valve plate, the piston drum having
- axial cylinders,
- a piston located in each cylinder, each piston having a free end protruding from the associated cylinder, and
- a drive shaft to which is allocated a drive flange and on which are supported the free ends of the pistons;
- and
- an adjustment system for adjusting a displacement volume of the piston drum, the adjustment system including a pivot cradle that is configured to be pivoted by an actuating drive so as to pivot the valve plate and the piston drum from a zero position, relative to the drive axis, by a maximum operating range that is limited by a minimum pivot angle (αmin) and a maximum pivot angle (αmax), wherein the maximum operating range, including the minimum pivot angle (αmin) and the maximum pivot angle (αmax), is shifted by a common amount equaling the shift of the minimum pivot angle(αmin) from the zero posistion thereof, and wherein, as a result of, the shifting of the operating range from the zero position, a range between the zero position and the minimum pivot angle (αmin) is not available for use.
A bent-axis machine comprising:
- a housing having a control cover and a piston drum rotatably mounted in the housing on a valve plate, the piston drum having axial cylinders, each cylinder accepting a piston, having a drive flange allocated to a drive shaft on which free ends of the pistons protruding from the cylinders are supported, and
- an adjustment system, including a pivot cradle, for adjusting the displacement volume with an actuating drive, with which the piston drum with the valve plate can be pivoted from a zero positon, relative to the drive axis, by a maximum oprating range that is limited by a minimum pivot angle (αmin) and a maximum pivot angle (αmax), a guiding of hydraulic fluid taking place via the pivot cradle through the valve plate, wherein the minimum pivot angle (αmin) of the operating range is shifted from the zero positon thereof by an angle of at least 5° and the maximum pivot angle (αmax) is shifted by the same angle as the minimum pivot angle(αmin) so that the maximum operating range is shifted by the same amount as the minimum pivot angle (αmin) is shifted, and wherein, as a result of the shifting of the operating range from the zero position, a range between the zero position and the minimum pivot angle (αmin) is not available for use.
Dependencies are inferred from the claim text.