Hydraulic control valve unit

Patent metadata

Field	Value
Publication number	US-10955057-B2
Application number	US-201916291133-A
Country	US
Kind code	B2
Filing date	Mar 4, 2019
Priority date	Mar 7, 2018
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A hydraulic control valve unit includes an input port hydraulically coupled to a pump, a working port hydraulically coupled to the working load, and a return port connected to a hydraulic tank. The unit includes a control slide movable into different working positions in an axial direction for controlling a hydraulic flow between the hydraulic ports and a slide housing surrounding the control slide. The control slide includes a control segment which is delimited in the axial direction by a control edge, and cooperates with an axial housing segment of the slide housing for controlling a flow cross section for hydraulic flow at the control segment. The control slide is rotationally driven about an axis of rotation in a rotational direction. The control edge of the control segment or the housing segment cooperating with the control segment is designed such that the flow cross section has a different size depending on a rotational position of the control slide.

First claim

The invention claimed is:

1. A hydraulic control valve unit configured to actuate a hydraulic working load, comprising:
a plurality of hydraulic ports comprising at least one input port configured to be hydraulically coupled to a pump, at least one working port configured to be hydraulically coupled to the working load, and at least one return port configured to be connected to a hydraulic tank;
a control slide movable into different working positions in an axial direction to control a hydraulic flow between the plurality of hydraulic ports; and
a slide housing that surrounds the control slide;
wherein the control slide comprises a plurality of control segments;
wherein, the control slide comprises at least one a delimited control segment which is delimited in the axial direction by a control edge and cooperates with an axial housing segment of the slide housing to control a flow cross section for hydraulic flow at the delimited control segment, where the delimited control segment is one of the plurality of control segments of the control slide;
wherein, the control slide is rotationally driven about an axis of rotation in a rotational direction;
further wherein, the control edge of the delimited control segment or the axial housing segment in cooperation with the delimited control segment is designed such that the flow cross section comprises a different size based on a rotational position of the control slide; and
wherein the control slide comprises a constant control segment where a control edge of the constant control segment or a constant housing segment of the slide housing in cooperation with the constant control segment is designed such that the flow cross section for hydraulic flow at the constant control segment is constant for any of the rotational positions of the control slide, where the constant control segment is one of the plurality of control segments of the control slide.

2. The control valve unit according to claim 1 , wherein the plurality of control segments of the control slide are arranged in the axial direction.

3. The control valve unit according to claim 2 , wherein the flow cross section for hydraulic flow for at least one of the plurality of control segments comprises a different size based on the rotational position of the control slide.

4. The control valve unit according to claim 1 , wherein one of the plurality of control segments of the control slide comprises a regulating control segment in an outflow region of the slide housing which connects the slide housing to the input port.

5. The control valve unit according to claim 1 , wherein one of the plurality of control segments of the control slide comprises an inlet control segment hydraulically upstream of the working port to control the hydraulic flow to the working port.

6. The control valve unit according to claim 1 , wherein one of the plurality of control segments of the control slide comprises comprises an outlet control segment hydraulically positioned between the working port and the return port to control the hydraulic flow to the return port.

7. The control valve unit according to claim 1 , wherein the control edge of the delimited control segment comprises at least one axially outer edge portion and at least one axially inner edge portion;
wherein, the at least one axially inner edge portion is offset inwardly relative to the axially outer edge portion.

8. The control valve unit according to claim 7 , wherein the at least one axially outer edge portion and the at least one axially inner edge portion are disposed in the rotational direction.

9. The control valve unit according to claim 7 , wherein the axially inner edge portion extends along and at least partially parallel to the rotational direction.

10. The control valve unit according to claim 7 , wherein the axially inner edge portion extends along the rotational direction and at least partly at an angle greater than 0° and less than 90° relative to the rotational direction.

11. The control valve unit according to claim 1 , wherein the axial housing segment in cooperation with the delimited control segment comprises a greater axial dimension than a largest axial dimension of the delimited control segment.

12. A hydraulic control valve unit configured to actuate a hydraulic working load, comprising:
a plurality of hydraulic ports comprising at least one input port configured to be hydraulically coupled to a pump, at least one working port configured to be hydraulically coupled to the working load, and at least one return port configured to be connected to a hydraulic tank;
a control slide movable into different working positions in an axial direction to control a hydraulic flow between the plurality of hydraulic ports; and
a slide housing that surrounds the control slide;
wherein the control slide comprises a plurality of control segments;
wherein, the control slide comprises a delimited control segment which is delimited in the axial direction by a control edge and cooperates with an axial housing segment of the slide housing to control a flow cross section for hydraulic flow at the delimited control segment, where the delimited control segment is one of the plurality of control segments of the control slide;
wherein, the control edge of the delimited control segment or the axial housing segment in cooperation with the delimited control segment is designed such that the flow cross section comprises a different size based on a rotational position of the control slide;
wherein, the control edge of the delimited control segment comprises at least one axially outer edge portion and at least one axially inner edge portion;
wherein, the at least one axially inner edge portion is offset inwardly relative to the at least one axially outer edge portion; and
wherein the control slide comprises a constant control segment where a control edge of the constant control segment or a constant housing segment of the slide housing in cooperation with the constant control segment is designed such that the flow cross section for hydraulic flow at the constant control segment is constant for any of the rotational positions of the control slide, where the constant control segment is one of the plurality of control segments of the control slide.

13. The control valve unit according to claim 12 , wherein the at least one axially outer edge portion and the at least one axially inner edge portion are disposed in the rotational direction.

14. The control valve unit according to claim 12 , wherein the at least one axially inner edge portion extends along and at least partially parallel to the rotational direction.

15. The control valve unit according to claim 12 , wherein the at least one axially inner edge portion extends along the rotational direction and at least partly at an angle greater than 0° and less than 90° relative to the rotational direction.

16. The control valve unit according to claim 12 , wherein the control slide is rotationally driven about an axis of rotation in a rotational direction.

17. A hydraulic control valve unit configured to actuate a hydraulic working load, comprising:
a plurality of hydraulic ports comprising at least one input port configured to be hydraulically coupled to a pump, at least one working port configured to be hydraulically coupled to the working load, and at least one return port configured to be connected to a hydraulic tank;
a control slide movable into different working positions in an axial direction to control a hydraulic flow between the plurality of hydraulic ports;
a slide housing that surrou

Assignees

• Deere & Co

Inventors

• Meid Michael
• Traut Sebastian

Classifications

• F16K11/078

  with pivoted and linearly movable closure members · CPC title

• F15B2211/3127

  Floating position connecting the working ports and the return line · CPC title

• F15B13/0402 Primary

  for linearly sliding valves, e.g. spool valves · CPC title

• F16K11/02 Primary

  with all movable sealing faces moving as one unit · CPC title

• F15B2013/0413

  with four or more positions · CPC title