CONTROL VALVE FOR A HYDRAULIC DEVICE WITH A REPLACEABLE HYDRAULICS UNIT

• US 20150292625A1
• Filed: 09/06/2013
• Published: 10/15/2015
• Est. Priority Date: 11/15/2012
• Status: Abandoned Application

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Kohler, David, Hoppe, Jens, Kinscher, Markus, Bayrakdar, Ali
• Application Number:
  US14/442,768
• Publication Number:
  US 20150292625A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F16K 1/00 Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces in combination with sliding valves F16K3/246, F16K3/267 ; diaphragm valves F16K7/00

Abstract

A control valve (1) for a hydraulic device, particularly a central valve of a camshaft adjuster for reciprocating internal combustion engines, with a receiving part (8) in which a hydraulic unit (2) with a control piston (5) is arranged, wherein the control piston (5) is moveably housed in the hydraulic unit (2), is loaded by a spring (6) and can be limited in its displacement movement by a stop element (7), and with a retaining ring (9) that can be fixed in an inner housing (12) to the receiving part (8) and wherein the stop element (7) is designed as a separate component and can be connected to the hydraulic unit (2) by a material-fit or positive-fit connection.

Claims

1. A control valve for a hydraulic device, comprising a receiving part in which a hydraulic unit with a control piston is arranged, the control piston is supported in the hydraulic unit so that it is displaceable, is loaded on one side by a spring, and is supported on the other side so that it is limited in a displacement movement thereof by a stop element, and a locking ring that is fixable in an interior receptacle on the receiving part, the stop element is constructed as a separate component and is connectable to the hydraulic unit with a material-fit or positive-fit connection.

2. The control valve according to claim 1, wherein the hydraulic unit has a valve housing made from plastic and a control sleeve, the stop element is fixed on the valve housing.

3. The control valve according to claim 1, wherein the stop element is connectable to the valve housing by a welding process.

4. The control valve according to claim 1, wherein the stop element has several individual stops.

5. The control valve according to claim 1, wherein the stop element is constructed as a ring.

6. The control valve according to claim 5, wherein the ring is connected to the valve housing by at least one snap-on connection.

7. The control valve according to claim 1, wherein the stop element has at least one guide unit for the locking ring.

8. The control valve according to claim 7, wherein the ring contains an outer groove for holding the locking ring.

9. The control valve according to claim 8, wherein the ring has a cutout in which ring eyelets of the locking ring are supportable.

10. The control valve according to claim 7, wherein the stop element has hooks for holding the locking ring.

11. The control valve of claim 1, wherein the control valve is a control value of a camshaft adjuster for a reciprocating internal combustion engine.