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US 10,041,350 B2Granted
Hydrostatic positive displacement machine
AssigneeRobert Bosch GmbH
InventorsUlrich Gordon Mohn, Heiko Erlenkeuser, Martin Buck, Rene Scheerer
Life of this patent
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Abstract
A hydrostatic positive displacement machine has a cam ring for adjusting the displacement volume thereof. This cam ring is guided in translation by approximately diametrically arranged outer circumferential surface segments on associated inner surface segments of a housing of the positive displacement machine.
Claims17
A hydrostatic positive displacement machine, comprising:
- a housing;
- a rotor mounted in the housing so as to be rotatable about an axis of rotation, said rotor being fitted with radially movable space dividers;
- and
- a cam ring having an inner circumferential surface on which the space dividers are supported,
- wherein an annular space is formed between the rotor and the cam ring, said annular space being subdivided by the space dividers into hydrostatic working spaces configured to revolve with the rotor and be brought alternately into pressure medium connection with a high pressure and a low pressure,
- wherein the cam ring has approximately diametrically arranged outer circumferential surface segments configured to guide the cam ring in a straight line translation transversely to the axis of rotation on associated inner surface segments of the housing,
- wherein at least one of the outer circumferential surface segments has a first surface portion directly opposite a second surface portion of an associated inner surface segment which does not mirror the second surface portion in a load-free mode of the positive displacement machine,
- wherein the first surface portion is non-planar and the second surface portion is planar.
5 more elements
A hydrostatic positive displacement machine, comprising:
- a housing;
- a rotor mounted in the housing so as to be rotatable about an axis of rotation, said rotor fitted with radially movable space dividers;
- and
- a cam ring having an inner circumferential surface on which the space dividers are supported,
- wherein an annular space is formed between the rotor and the cam ring, said annular space subdivided by the space dividers into hydrostatic working spaces configured to revolve with the rotor and be brought alternately into pressure medium connection with a high pressure and a low pressure,
- wherein the cam ring has approximately diametrically arranged outer circumferential surface segments configured to guide the cam ring in translation transversely to the axis of rotation on associated inner surface segments of the housing,
- wherein at least one of the outer circumferential surface segments has a non-planar surface directly opposite the associated inner surface segment in a load-free mode of the positive displacement machine,
- wherein longitudinal sections of the at least one of the outer circumferential surface segment are hollow or concave along the axis of rotation in a load-free mode,
- wherein the at least one of the outer circumferential surface segments has a first surface portion directly opposite a second surface portion of the associated inner surface segment which does not mirror the second surface portion of the associated inner surface segment in a load-free mode of the positive displacement machine, and
- wherein a contact area of the second surface portion with the first surface portion is approximately equal to the second surface portion in a loaded mode.
7 more elements
Dependencies are inferred from the claim text.