Hydraulic valve assembly

Patent metadata

Field	Value
Publication number	US-12467481-B2
Application number	US-202318358467-A
Country	US
Kind code	B2
Filing date	Jul 25, 2023
Priority date	Jul 28, 2022
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A hydraulic valve assembly includes a connection section, a first valve section, at least one second valve section, and a hydraulic pilot control device with a pilot valve device. The first valve section has a first spool piston and a first spool diverter. The second valve section has a second spool piston and a second spool diverter. The first spool diverter and the second spool diverter are each switchable to at least a first spool diverter switching position and a second spool diverter switching position. Pilot pressure is applied in parallel to the first spool diverter and the second spool diverter via the hydraulic pilot control device in a first switching position of the pilot valve device for switching together into the first spool diverter switching position.

First claim

The invention claimed is:

1 . A hydraulic valve assembly, comprising: a connection section; a first valve section which can be pressurized via the connection section; at least one second valve section which can be pressurized via the connection section; and a hydraulic pilot control device with a pilot valve device, the hydraulic pilot control device comprising a pilot line, a return line, a first pilot branch, and a second pilot branch, wherein the first valve section includes a first spool piston, a first spool diverter, at least one consumer port of a first type of the first valve section, and at least one consumer port of a second type of the first valve section, and wherein the second valve section includes a second spool piston, a second spool diverter, at least one consumer port of a first type of the second valve section, and at least one consumer port of a second type of the second valve section, and the first spool diverter and the second spool diverter can each be switched at least into a first spool diverter switching position and a second spool diverter switching position so that the at least one consumer port of the first type of the first valve section can be pressurized via the first spool piston and the at least one consumer port of the first type of the second valve section can be pressurized via the second spool piston when the first spool diverter and the second spool diverter are each in the first spool diverter switching position, and so that the at least one consumer port of the second type of the first valve section can be pressurized via the first spool piston and the at least one consumer port of the second type of the second valve section can be pressurized via the second spool piston when the first spool diverter and the second spool diverter are each in the second spool diverter switching position, wherein pilot pressure can be applied to the first spool diverter and the second spool diverter via the hydraulic pilot control device, wherein the pilot pressure is applied in parallel to the first spool diverter and the second spool diverter in a first switching position of the pilot valve device for switching together into the respective first spool diverter switching position, the pilot pressure is applied in parallel to the first spool diverter and the second spool diverter in a second switching position of the pilot valve device for parallel switching together into the second spool diverter switching position, wherein a pilot pressure in the first pilot branch switches the first spool diverter and the second spool diverter together into the respective first spool diverter switching position, wherein a pilot pressure in the second pilot branch switches the first spool diverter and the second spool diverter together into the respective second spool diverter switching position, wherein the pilot valve device in the first switching position applies the pilot pressure to the first pilot branch and connects the second pilot branch to the return line, and wherein the pilot valve device in the second switching position applies the pilot pressure to the second pilot branch and connects the first pilot branch to the return line.

2 . The hydraulic valve assembly according to claim 1 , wherein the pilot valve device comprises a first pilot valve and a second pilot valve,
wherein in the first switching position of the pilot valve device, the first pilot valve connects the first pilot branch to the pilot line and the second pilot valve connects the second pilot branch to the return line, and wherein in the second switching position of the pilot valve device, the first pilot valve connects the first pilot branch to the return line and the second pilot valve connects the second pilot branch to the pilot line.

3 . The hydraulic valve assembly claim 1 , further comprising a pressure line for pressurizing the first valve section and the second valve section, wherein a shut-off valve is disposed in the pressure line.

4 . The hydraulic valve assembly according to claim 3 , wherein the shut-off valve can be switched from a blocking position to an open position via the hydraulic pilot control device.

5 . The hydraulic valve assembly according to claim 4 , wherein the shut-off valve can be switched from the blocking position to the open position via the hydraulic pilot control device, in that the hydraulic valve assembly comprises at least one shut-off valve pilot line via which the pilot pressure can be applied to the shut-off valve in order to switch into an open position releasing the pressure line, the hydraulic pilot control device comprising a shut-off pilot valve, wherein the shut-off pilot valve is configured to connect the shut-off valve to the pilot line or the return line.

6 . The hydraulic valve assembly according to claim 5 , wherein the at least one shut-off valve pilot line can be relieved to a tank via a relief line.

7 . The hydraulic valve assembly according to claim 6 , wherein a hydraulic resistor is disposed in the relief line.

8 . The hydraulic valve assembly according to claim 7 , wherein the hydraulic resistor is a nozzle.

9 . The hydraulic valve assembly according to claim 6 , wherein the relief line opens into the return line of the hydraulic pilot control device.

10 . The hydraulic valve assembly according to claim 4 , wherein the hydraulic pilot control device has at least one shut-off valve pilot line for switching the shut-off valve from the blocking position to the open position, wherein the pilot pressure is applied to the at least one shut-off valve pilot line only when the first spool diverter and the second spool diverter are each in the first spool diverter switching position or when the first spool diverter and the second spool diverter are each in the second spool diverter switching position.

11 . The hydraulic valve assembly according to claim 10 , wherein the at least one shut-off valve pilot line can be pressurized with pilot pressure via the first pilot branch and/or via the second pilot branch.

12 . A mobile hydraulic system with the hydraulic valve assembly according to claim 1 , wherein the mobile hydraulic system has at least a first group of hydraulic consumers and a second group of hydraulic consumers, wherein the first group of hydraulic consumers is connected to the at least one consumer port of the first type of the first valve section and to the at least one consumer port of the first type of the second valve section, and the second group of hydraulic consumers being connected to the at least one consumer port of the second type of the first valve section and to the at least one consumer port of the second type of the second valve section.

13 . A commercial vehicle having the mobile hydraulic system according to claim 12 .

14 . A hydraulic valve assembly, comprising:
a connection section; a first valve section which can be pressurized via the connection section; at least one second valve section which can be pressurized via the connection section; and a hydraulic pilot control device with a pilot valve device, wherein the first valve section includes a first spool piston, a first spool diverter, at least one consumer port of a first type of the first valve section, and at least one consumer port of a second type of the first valve section, and wherein the second valve section includes a second spool piston, a second spool diverter, at least one consumer port of a first type of the second valve section, and at least one consumer port of a second type of the second valve section, and the first spool diverter and the second spool diverter can each be switched at least into

Assignees

• Hawe Hydraulik Se

Inventors

• Wechsel Thomas
• Heusser Martin
• Sabatier Jean-Michel

Classifications

• F15B2211/30595

  with additional valves between the groups of valves for multiple output members · CPC title

• F15B2211/50518

  using pressure relief valves · CPC title

• F15B2211/7142

  the output members being arranged in multiple groups · CPC title

• F15B2211/40507

  with constant throttles or orifices · CPC title

• F15B2211/30515

  Load holding valves · CPC title