Piston for electromagnetically actuate able hydraulic valve and hydraulic system with the electromagnetically actuate able hydraulic valve and a signal element

Patent metadata

Field	Value
Publication number	US-11028920-B2
Application number	US-201816045612-A
Country	US
Kind code	B2
Filing date	Jul 25, 2018
Priority date	Jul 27, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A piston for an electromagnetically actuatable hydraulic valve wherein the piston is configured cylindrical and axially movable along a central opening that extends along a longitudinal axis of a housing of the electromagnetically actuatable hydraulic valve, wherein plural connections of the housing are opened or closed according to a position of the piston wherein the plural connections are flow connected with the central opening, wherein the hydraulic valve is hydraulically actuatable by a signal element, wherein a damping system is provided for reducing oscillations of a signal pressure of the signal element that impacts the piston, and wherein the damping system is configured in the piston that includes a receiving cavity for receiving the damping system.

First claim

What is claimed is:

1. An electromagnetically actuatable hydraulic valve, comprising:
a piston arranged in a housing; and
a damping system including a first hollow damping element that is axially movable in the piston and a spring element that is axially supported at the piston and at the first hollow damping element,
wherein the piston is configured cylindrical and axially movable along a central opening that extends along a longitudinal axis of the housing of the electromagnetically actuatable hydraulic valve,
wherein plural connections of the housing are opened or closed according to a position of the piston wherein the plural connections are flow connected with the central opening,
wherein the piston is axially movable by a force generated directly at the piston by a hydraulic signal pressure from a signal element,
wherein the damping system reduces oscillations of the force generated directly at the piston by the hydraulic signal pressure from the signal element when the piston is at the position,
wherein an entirety of the damping system including an entirety of the first hollow damping element and an entirety of the spring element is received in a receiving cavity configured in the piston,
wherein the entirety of the damping system always moves together with the piston when the piston moves,
wherein the first hollow damping element seals against the signal pressure along an axial travel range of the first hollow damping element in the piston, and
wherein the first hollow damping element partially envelops the spring element.

2. The electromagnetically actuatable hydraulic valve according to claim 1 , wherein the damping system is configured coaxial with the longitudinal axis.

3. The electromagnetically actuatable hydraulic valve according to claim 1 ,
wherein the piston includes an inlet opening of the receiving cavity at a face of the piston that is oriented towards the signal element, and
wherein the damping system is insertable through the inlet opening.

4. The electromagnetically actuatable hydraulic valve according to claim 3 , wherein a cover element with a circular opening is arranged in the inlet opening and closes the inlet opening outside of the circular opening.

5. The electromagnetically actuatable hydraulic valve according to claim 1 , wherein the damping system is axially secured in the piston by a safety element.

6. The electromagnetically actuatable hydraulic valve according to claim 1 , wherein the signal element is an electromagnetic actuator.

7. A hydraulic system, comprising:
the electromagnetically actuatable hydraulic valve according to claim 1 ,
wherein the signal element is at least partially received in a receiving opening of the housing.

8. The hydraulic system according to claim 7 , wherein the housing includes additional connections that are flow connected with the receiving opening.

9. The hydraulic system according to claim 7 , wherein the central opening is arranged coaxial with the receiving opening.

10. The electromagnetically actuatable hydraulic valve according to claim 1 , wherein the spring element includes two coaxial coil springs that are wound in opposite directions.

Assignees

• ECO Holding 1 GmbH

Inventors

• Lentz Chris

Classifications

• F16K31/42 Primary

  by means of electrically-actuated members in the supply or discharge conduits of the fluid motor (F16K31/40 takes precedence) · CPC title

• F16K47/00

  Means in valves for absorbing fluid energy (for pipes F16L55/00) · CPC title

• G05D16/2097

  using pistons within the main valve · CPC title

• G05D16/2024

  the throttling means being a multiple-way valve · CPC title

• F16K11/07

  with cylindrical slides · CPC title