Swash plate type hydraulic motor having offset swash plate pivot

Details Swash plate type hydraulic motor having offset swash plate pivot Swash plate type hydraulic motor having offset swash plate pivot

1994-10-25

1997-07-22

Thorpe, Timothy

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

91505, 92 122, F01B 300, F01B 1304

Patent

active

056494688

ABSTRACT:
A swash plate type hydraulic motor switchable between high speed and low speed, comprises a main case, a cylinder block supported in the main case to be rotatable about a rotational axis, the cylinder block including a plurality of plungers having longitudinal axes extending parallel to the rotational axis, a swash plate supported in the main case for contacting forward ends of the plungers and pivotable about a pivotal axis between a high speed position and a low speed position, the pivotal axis extending parallel to a plane perpendicular to the rotational axis, and two trunnions projecting on the pivotal axis from opposite peripheral positions of the swash plate. The pivotal axis is located in a region between and close to a first reference plane extending perpendicular to a plane defined by the forward ends of the plungers in the low speed position, intersecting the rotational axis, and extending parallel to the pivotal axis, and a second reference plane extending perpendicular to a plane defined by the forward ends of the plungers in the high speed position, intersecting the rotational axis, and extending parallel to the pivotal axis.

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patent: 4825753 (1989-05-01), Inoue et al.
patent: 5095807 (1992-03-01), Wagenseil

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