Valve for variable throttling of a hydraulic flow with a fatigue-resistant mechanical means for reducing possible valve oscillations

Patent metadata

Field	Value
Publication number	US-11149596-B2
Application number	US-202016888837-A
Country	US
Kind code	B2
Filing date	May 31, 2020
Priority date	Jun 19, 2019
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A valve for variable throttling of a hydraulic flow includes a tappet and a guide element in which the tappet is guided for movement in a stroke direction. The valve also includes at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet so as to reduce possible valve oscillations.

First claim

What is claimed is:

1. A valve for variable throttling of a hydraulic flow, comprising:
a tappet;
a guide element in which the tappet is guided for movement in a stroke direction; and
at least one fatigue-resistant, mechanical member that locally reduces a radial play of the tappet by applying a transverse force to the tappet during a stroke movement of the tappet so as to reduce valve oscillations, the at least one mechanical member being arranged radially outside the tappet.

2. The valve according to claim 1 , wherein the at least one mechanical member is metal.

3. The valve according to claim 1 , wherein the at least one mechanical member includes a spring.

4. The valve according to claim 3 , wherein the spring is a flexible spring.

5. The valve according to claim 4 , wherein the flexible spring extends in the stroke direction.

6. The valve according to claim 1 , wherein the at least one mechanical member includes at least two mechanical members that are distributed along a periphery around the tappet.

7. The valve according to claim 1 , wherein the at least one mechanical member is integrated at least in the guide element or is formed integrally the guide element.

8. The valve according to claim 7 , wherein the guide element includes a sleeve.

9. The valve according to claim 1 , wherein the guide element includes a resilient sleeve on which a pretensioning element is supported, and wherein the pretensioning element pretensions the tappet in the stroke direction.

10. The valve according to claim 4 , wherein the flexible spring extends transversely to the stroke direction.

11. The valve according to claim 8 , wherein the sleeve defines a cut-out region, and the at least one mechanical member is arranged in the cut-out region.

12. The valve according to claim 11 , wherein the at least one mechanical member projects radially inwardly from the sleeve into contact with an outer surface of the tappet so as to apply the transverse force to the tappet.

Assignees

• Bosch Gmbh Robert

Inventors

• Lechler Andreas
• Gardt Andrej
• Eisele Christoph
• Kurz Edgar
• Schorn Felix
• Kreutzer Joern
• Biehler Marcus
• Kloss Michael
• Schellnegger Patrick
• Stahr Wolf

Classifications

• F16K17/0433

  with vibration preventing means · CPC title

• F01L9/10 Primary

  by fluid means, e.g. hydraulic · CPC title

• F16K27/0209

  Check valves or pivoted valves · CPC title

• F16K47/02 Primary

  for preventing water-hammer or noise · CPC title

• F16K15/063

  the valve being loaded by a spring · CPC title