Hydraulic steering arrangement

Patent metadata

Field	Value
Publication number	US-10640144-B2
Application number	US-201715825222-A
Country	US
Kind code	B2
Filing date	Nov 29, 2017
Priority date	Jan 6, 2017
Publication date	May 5, 2020
Grant date	May 5, 2020

Abstract

A hydraulic steering arrangement is shown having a steering unit and two working ports each of which being connected to the steering unit by a working line ( 3 ), wherein an anti jerk valve ( 9 ) is arranged in each working line ( 3 ), the anti jerk valve ( 9 ) having a valve element ( 12 ) being loaded in opening direction by the pressure in the working line ( 3 ) and in closing direction by restoring means ( 17 ). A vehicle equipped with such a steering arrangement should have a good comfort. To this end the valve element ( 12 ) is loaded in closing direction by the pressure in the working line ( 3 ) via delay means ( 21 ).

First claim

What is claimed is:

1. A hydraulic steering arrangement having a steering unit and two working ports each of which being connected to the steering unit by a working line, wherein an anti jerk valve is arranged in each working line, each anti jerk valve having a valve element being loaded in opening direction by a pressure in the working line connected to the respective anti jerk valve of the valve element and in closing direction by restoring means, wherein the valve element is loaded in closing direction by the pressure in the working line connected to the respective anti jerk valve of the valve element via delay means, wherein the valve element has a first pressure area which is loaded by the pressure in the working line and a second pressure area which is loaded by the pressure at an outlet of the delay means, wherein the second pressure area is larger than the first pressure area.

2. The steering arrangement according to claim 1 , wherein the valve element is arranged in a valve housing and the delay means are arranged in the valve housing as well.

3. The steering arrangement according to claim 2 , wherein the delay means are in form of an orifice.

4. The steering arrangement according to claim 1 , wherein the delay means are in form of an orifice.

5. The steering arrangement according to claim 4 , wherein the orifice is arranged in a support wall supporting the restoring means.

6. The steering arrangement according to claim 5 , wherein the orifice is part of the support wall.

7. The steering arrangement according to claim 1 , wherein the valve element in the region of the first pressure area is of conical form.

8. The steering arrangement according to claim 7 , wherein the housing comprises an outlet opening and the valve element is slidably movable over the outlet opening.

9. A hydraulic steering arrangement having a steering unit and two working ports each of which being connected to the steering unit by a working line, wherein an anti jerk valve is arranged in each working line, each anti jerk valve having a valve element being loaded in opening direction by a pressure in the working line connected to the respective anti jerk valve of the valve element and in closing direction by restoring means, wherein the valve element is loaded in closing direction by the pressure in the working line connected to the respective anti jerk valve of the valve element via delay means;
wherein the delay means are in form of an orifice; and
wherein the orifice is arranged in a support wall supporting the restoring means.

10. The hydraulic steering arrangement according to claim 9 , wherein the valve element is arranged in a valve housing and the delay means are arranged in the valve housing as well.

11. The hydraulic steering arrangement according to claim 9 , wherein the valve element in the region of the first pressure area is of conical form.

12. The hydraulic steering arrangement according to claim 9 , wherein the housing comprises an outlet opening and the valve element is slidably movable over the outlet opening.

Assignees

• Danfoss Power Solutions Aps

Inventors

• Soerensen Ole
• Rahimzai Abdul Karim

Classifications

• B62D5/06 Primary

  fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle · CPC title

• B62D5/20

  specially adapted for particular type of steering gear or particular application (steering gears per se B62D3/00; steering linkages not characterised by being power-assisted or power-driven B62D7/00) · CPC title

• B62D5/08 Primary

  characterised by type of {steering} valve used (valves in general F16K) · CPC title

• B62D12/00

  Steering specially adapted for vehicles operating in tandem or having pivotally connected frames (steering endless tracks or the like B62D11/00; steering specially adapted for trailers B62D13/00) · CPC title

• F16K27/04

  of sliding valves · CPC title