Axial piston machine having a control flow fluid line passing through a medial shaft portion
OwnerKarl Eickmanninventor
Life of this patent
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Abstract
In hydrostatic pumps, motors and transmissions; faces, which slide and seal along adjacent faces, commonly have recesses for hydrostatic lubrication or for control of flow through ports. The invention provides additional arrangements on such faces for the provision of additional functions, for example, for the control of hydrodynamic flow into spaces between faces, the control of an additional control flow through the faces and the sealing therof or it provides recesses or seal inserts of specific locations or configurations for the improvement of the efficiency of the faces or for assurance of additional actions by the faces.
Claims13
An arrangement in a fluid flow facilitating device of the axial piston type, wherein substantially axially extended pistons reciprocate in substantially axial cylinders of a barrell,
- wherein a first primary control means is provided to control the flow of driving fluid to and from said cylinders,
- wherein said arrangement provides a second control means for the passage of a separate control flow,
- wherein said control flow extends through said first primary control means and through a first passage which extends through said barrell into a second passage which extends into a shaft of said arrangement, and,
- wherein an axially directed chamber is provided in said shaft to communicate with said control flow and which contains a control piston whereby said control piston which reciprocates in response to said control flow to drive a reciprocable portion of a member which is provided at least indirectly on said shaft.
An arrangement in a fluid flow facilitating device with provision of a commonly applied primary first control means and at least one rotor,
- wherein the arrangement provides a second control means for the control of a controllable matter associated to the device, provided
- on a holding face of an axial piston type fluid flow facilitating device, such as a pump, motor or transmission of the axial piston type, wherein said holding face is commonly utilized to hold the spherical head of a shaft of the device,
- wherein the arrangement consists of a passage through said holding face in combination with a passage extension into a cylinder arranged in said shaft of said device,
- wherein an axially movable piston which is biased at one end by a spring force and is biased at the other end by fluid pressure passed through said passage through said holding face into said cylinder,
- wherein said piston includes transfer means to transfer its movement to controllable members, and,
- wherein thereby said controllable members are controlled by said fluid pressure which passes through said arrangement of said passage through said holding face.
A fluid motor of the axial piston type, comprising, in combination,
- (a) pistons which reciprocate in axially directed cylinders of a rotor which is revolvably borne on a medial shaft in the rear portion of a housing with said medial shaft forming on its front end a part ball formed holding head;
- (b) a driven shaft provided under an angle of inclination relative to said rotor and to said medial shaft while said driven shaft is revolvably borne in the front portion of said housing;
- (c) ports, passages and control faces to pass a flow of pressurized driving fluid through said cylinders to drive said pistons for power strokes in said cylinders;
- (d) a piston rod holding flange provided on the rear end of said driven shaft to hold the front heads of piston rods which with their rear feet are swingably borne in said pistons while a holding bed is provided in the medial portion of the rear end of said driven shaft to bear therein a holding head of the front portion of said medial shaft whereby said medial shaft which with its rear end is borne in the rear end of said housing obtains the holding of its front end and of its rear end;
- wherein said medial shaft is provided with a passage which extends axially through said medial shaft to provide a fluid line for a control flow of pressurizable fluid of a control flow pressure;
- wherein said driven shaft is provided with a chamber which is communicated to said holding bed while a communication is provided between said chamber of said driven shaft and said passage of said medial shaft;
- wherein a control piston is axially movably provided in said chamber of said driven shaft;
- wherein a control flow port is provided on the rear end of said passage of said medial shaft to permit the supply of said control flow of pressurized fluid into said passage of said medial shaft,
- whereby the rear end of said control piston in said chamber in said driven shaft is subjectable to said control flow pressure of said control flow of pressurizable fluid and said control piston is connectable to a movable member which is at least indirectly partially borne by said driven shaft to move said movable member in dependance on the axial movement of said control piston.
Dependencies are inferred from the claim text.