Electromagnetic actuator

Patent metadata

Field	Value
Publication number	US-9541215-B2
Application number	US-201314652496-A
Country	US
Kind code	B2
Filing date	Oct 17, 2013
Priority date	Dec 17, 2012
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An electromagnetic actuator includes: a magnetic coil, which has a coil form having a coil winding situated on it and a central clearance extending in an axial direction; an armature slidably situated in the central clearance; a terminal piece situated on an axial end of the coil form, in which an actuating element is slidably supported in the axial direction. The armature is movable by an actuation of the magnetic coil such that a force applied by the armature is transmitted to the actuating element. The actuating element is configured in two parts, including an actuating pin supported in the terminal piece and a separator fixedly connected to the actuating pin on an end section of the actuating pin protruding from the terminal piece in the direction of the armature and which is acted upon by the armature when the magnetic coil is actuated.

First claim

What is claimed is:

1. An electromagnetic actuator, comprising:
a magnetic coil, which has a coil form and a coil winding situated on the coil form, wherein the coil form has a central clearance extending in an axial direction;
an armature slidably situated in the central clearance;
a terminal piece situated on an axial end of the coil form; and
an actuating element supported in the terminal piece, the actuating element being slidable in the axial direction of the coil form;
wherein the armature is configured to be movable by an actuation of the magnetic coil such that a force applied by the armature of the electromagnetic actuator is transmitted to the actuating element, and wherein the actuating element is configured in two parts and has (i) an actuating pin supported in the terminal piece and (ii) a separator which is connected in a fixed manner to the actuating pin on an end section of the actuating pin protruding from the terminal piece in the direction of the armature and on which the armature acts when the magnetic coil is actuated,
wherein the separator is made from a non-magnetic material, and
wherein the actuating pin is not fixedly connected to the armature and includes a bearing independently of a bearing of the armature.

2. The electromagnetic actuator as recited in claim 1 , wherein the separator is configured in the form of a cup.

3. The electromagnetic actuator as recited in claim 1 , wherein the separator has at least one laterally projecting shoulder which limits the maximum displacement path of the actuating pin in the terminal piece by making contact with one of the terminal piece or a component connected to the terminal piece when the separator is acted upon by the armature.

4. The electromagnetic actuator as recited in claim 2 , wherein the actuating pin is inserted by the end section protruding from the terminal piece in the direction of the armature into the cup-shaped separator.

5. The electromagnetic actuator as recited in claim 4 , wherein the cup-shaped separator is one of pressed or shrunk onto the actuating pin.

6. The electromagnetic actuator as recited in claim 1 , wherein the electromagnetic actuator is part of an electromagnetic pressure-regulating valve for setting a hydraulic pressure in a hydraulic line.

7. The electromagnetic actuator as recited in claim 1 , wherein the non-magnetic material includes non-magnetic steel.

8. An electromagnetic actuator, comprising:
a magnetic coil, which has a coil form and a coil winding situated on the coil form, wherein the coil form has a central clearance extending in an axial direction;
an armature slidably situated in the central clearance;
a terminal piece situated on an axial end of the coil form; and
an actuating element supported in the terminal piece, the actuating element being slidable in the axial direction of the coil form;
wherein the armature is configured to be movable by an actuation of the magnetic coil such that a force applied by the armature of the electromagnetic actuator is transmitted to the actuating element, and wherein the actuating element is configured in two parts and has (i) an actuating pin supported in the terminal piece and (ii) a separator which is connected in a fixed manner to the actuating pin on an end section of the actuating pin protruding from the terminal piece in the direction of the armature and on which the armature acts when the magnetic coil is actuated,
wherein the separator is made of a non-magnetic material,
wherein the separator is configured in the form of a cup,
wherein the actuating pin is inserted by the end section protruding from the terminal piece in the direction of the armature into the cup-shaped separator,
wherein the cup-shaped separator is one of pressed or shrunk onto the actuating pin, and
wherein the cup-shaped separator has a cylinder sleeve, a bottom, and, on an end facing away from the bottom, a laterally projecting collar which limits the maximum displacement path of the actuating pin in the terminal piece by making contact with one of the terminal piece or a component connected to the terminal piece when the separator is acted upon by the armature.

9. The electromagnetic actuator as recited in claim 8 , wherein the actuating pin has a first length and the cup-shaped separator is one of pressed or shrunk onto the actuating pin to such an extent that the distance between the collar and an end of the actuating pin facing away from the armature forms a measure of a second length that is set with respect to the axial thickness of the terminal piece in such a way that the actuating pin protrudes from the terminal piece by a defined third distance on the side of the terminal piece facing away from the armature when the collar makes contact with the one of the terminal piece or the component connected to the terminal piece.

10. An electromagnetic actuator, comprising:
a magnetic coil, which has a coil form and a coil winding situated on the coil form, wherein the coil form has a central clearance extending in an axial direction;
an armature slidably situated in the central clearance;
a terminal piece situated on an axial end of the coil form;
an actuating element supported in the terminal piece, the actuating element being slidable in the axial direction of the coil form;
wherein the armature is configured to be movable by an actuation of the magnetic coil such that a force applied by the armature of the electromagnetic actuator is transmitted to the actuating element, and wherein the actuating element is configured in two parts and has (i) an actuating pin supported in the terminal piece and (ii) a separator which is connected in a fixed manner to the actuating pin on an end section of the actuating pin protruding from the terminal piece in the direction of the armature and on which the armature acts when the magnetic coil is actuated;
a pole tube inserted into the central clearance of the coil form, wherein the pole tube has at the outer circumference a clearance, the armature is slidably supported in the pole tube, and an end of the pole tube facing the armature on the side of the terminal piece has a yoke configured as one piece on the pole tube, and wherein a through hole is provided in the yoke, the diameter of the through hole being dimensioned in such a way that the separator is movable back and forth in the through hole.

Assignees

• Bosch Gmbh Robert

Inventors

• Schudt Klaus

Classifications

• H01F7/081

  Magnetic constructions · CPC title

• H01F7/127

  Assembling · CPC title

• H01F2007/062

  Details of terminals or connectors for electromagnets · CPC title

• H01F7/121

  Guiding or setting position of armatures, e.g. retaining armatures in their end position · CPC title

• F16K31/06 Primary

  using a magnet {, e.g. diaphragm valves, cutting off by means of a liquid} · CPC title