PRESSURE REDUCING VALVE

Abstract

A pressure reducing valve, for a clamping device in particular, has a control plunger, which is acted upon by a regulating pressure against an adjustable force, and a closing body which is preloaded against a valve seat in the closing direction by the force of a compression spring. The closing body is movable from its closed position into its opened position, past the valve seat, via a transfer element, thereby allowing control of the flow of pressure medium from a pressure inlet to a regulating pressure outlet. The control plunger is designed as a hollow piston in order to accommodate the closing body, and it forms the valve seat for the closing body which is guided in the control plunger.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a longitudinal cross section through an inventive pressure reducing valve, and

FIG. 2 shows a longitudinal cross section in the region of the control plunger through an inventive pressure reducing valve according to a further exemplary embodiment.

Claims

1. A pressure reducing valve, comprising a pressure inlet; a regulating pressure outlet; a control plunger which is acted upon against an adjustable force by a regulating pressure; a valve seat; a compression spring; a transfer element; a closing body which is preloaded against said valve seat in a closing direction by a force of said compression spring and which is movable from its closed position into its open position past said valve seat via said transfer element thereby allowing control of a flow of pressure medium from said pressure inlet to said regulating pressure outlet, said control plunger being configured as a hollow piston for accommodating said closing body and forming said valve seat for said closing body, which is guided in said control plunger.

2. A pressure reducing valve as defined in claim 1, wherein said control plunger is guided in a valve bore and, with this and via an end face, it borders a control chamber that is acted upon by the regulating pressure.

3. A pressure reducing valve as defined in claim 2; and further comprising at least one control channel which connects said control chamber with said regulating pressure outlet.

4. A pressure reducing valve as defined in claim 1, wherein said transfer element is configured as a housing-mounted plunger which supports said closing body in its opened position past said valve seat against the force of said compression spring.

5. A pressure reducing valve as defined in claim 1, wherein said closing body is configured as a ball.

6. A pressure reducing valve as defined in claim 1, wherein said control plunger has an inner space which is acted upon by an inlet pressure via at least one radial bore.

7. A pressure reducing valve as defined in claim 1; and further comprising radial bores which lead into an inner space of said control plunger in a region of said closing body.

8. A pressure reducing valve as defined in claim 7, wherein said radial bores lead into a formation selected from the group consisting of a circumferential annular groove provided on an outer circumference of said control plunger and connected with said pressure inlet via at least one pressure channel, and at least one pocket.

9. A pressure reducing valve as defined in claim 1; and further comprising a pressure monitoring sensor, said control plunger being operatively connected with said pressure monitoring sensor.

10. A pressure reducing valve as defined in claim 9, wherein said pressure monitoring sensor is an electrical switch.

11. A pressure reducing valve as defined in claim 1; and further comprising at least one housing-mounted stop, said control plunger including a radial collar which interacts with said at least one housing-mounted stop.

12. A pressure reducing valve as defined in claim 1; and further comprising a pressure monitoring sensor, said control pressure actuating said pressure monitoring sensor via a radial collar.

13. A pressure reducing valve as defined in claim 1; and further comprising means providing a force acting on said control plunger in an opening direction and selected from the group consisting of one control spring and a proportional magnet.

14. A pressure reducing valve as defined in claim 13; and further comprising an adjusting element which adjusts a preload on said control spring in order to change a regulating pressure.

15. A pressure reducing valve as defined in claim 13, wherein said adjusting element is configured as an adjusting spindle.

16. A pressure reducing valve as defined in claim 1; and further comprising at least one radial seal which seals said pressure inlet against said regulating pressure outlet against a chamber with a control spring or a proportional magnet.

17. A pressure reducing valve as defined in claim 1, wherein the pressure reducing valve is configured as a pressure reducing valve for a clamping device.