Abstract
An electromagnetic switching device (10) and a method for producing the electromagnetic switching device (10) are disclosed. To this end, a magnetic armature (13) and a pressure pin (19) which is movable in a bearing (21) along an axis (A) are provided. A bearing sleeve (11) accommodates at least the bearing (21) and the magnetic armature (13). An electromagnetic casing (12) and the bearing sleeve (11) are together made of a single material in the form of a one-piece component (100).
Claims
1. An electromagnetic switching device comprising: a magnetic armature; a pressure pin movably guided along an axis in a bearing; a yoke; a bearing sleeve accommodating at least the bearing and the magnetic armature; a coil, including a coil carrier; and an electromagnet casing surrounding an outer diameter of the coil; the electromagnet casing and bearing sleeve being formed together as a one-piece component from a material, the bearing sleeve including a cover closing a first end of the bearing sleeve, the bearing sleeve including a second end opposite of the first end being connected to the electromagnet casing.
2. The electromagnetic switching device as recited in claim 1 wherein a conical pole core is formed on the bearing sleeve from the material of the electromagnet casing and the bearing sleeve.
3. The electromagnetic switching device as recited in claim 1 wherein the yoke is conical, a conical pole core and the conical yoke being formed on the bearing sleeve from the material of the electromagnet casing and the bearing sleeve.
4. The electromagnetic switching device as recited in claim 3 wherein the pole core and the yoke are separated from each other by a magnetically saturated intermediate segment.
5. The electromagnetic switching device as recited in claim 1 wherein the magnetic armature is provided at the first end of the bearing sleeve and the bearing is provided at the second end of the bearing sleeve.
6. The electromagnetic switching device as recited in claim 3 wherein the conical yoke is provided at the first end of the bearing sleeve.
7. The electromagnetic switching device as recited in claim 3 wherein the conical yoke is provided at the first end of the bearing sleeve and the conical pole core is provided at the second end of the bearing sleeve.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1 shows a sectional representation of an electromagnetic switching device according to the prior art;
(2) FIG. 2a shows a sectional representation of a first specific embodiment of the electromagnetic switching device, in which the electromagnet casing, the bearing sleeve and the pole core are formed as a one-piece component;
(3) FIG. 2b shows a sectional representation of the one-piece component according to the first specific embodiment;
(4) FIG. 2c shows a three-dimensional sectional representation of the one-piece component according to the first specific embodiment;
(5) FIG. 3a shows a sectional representation of a second specific embodiment of the electromagnetic switching device, in which the electromagnet casing, the bearing sleeve, the pole core and the yoke are formed as a one-piece component;
(6) FIG. 3b shows a sectional representation of the one-piece component according to the second specific embodiment;
(7) FIG. 3c shows a three-dimensional sectional representation of the one-piece component according to the second specific embodiment;
(8) FIG. 4a shows a sectional representation of a third specific embodiment of the electromagnetic switching device, in which the electromagnet casing and the bearing sleeve are formed as a one-piece component, and the pole core and the yoke are separate components;
(9) FIG. 4b shows a sectional representation of the one-piece component according to the third specific embodiment; and
(10) FIG. 4c shows a sectional representation and a three-dimensional representation of the pole core, which is mounted as a separate component on the bearing sleeve.
DETAILED DESCRIPTION
(11) Identical reference numerals are used for the same elements or elements having the same function. Furthermore, for the sake of clarity, only reference numerals which are necessary for describing the particular figure are shown in the individual figures. The illustrated specific embodiments only represent examples of how the electromagnetic switching device according to the present invention may be designed and do not represent a final limitation of the present invention.
(12) FIG. 1 shows an electromagnetic switching device 10 according to the prior art. Bearing sleeve 11, which accommodates magnetic armature 13, is connected to cup-shaped housing part 50 with the aid of a welding method and is thus part of electromagnetic switching device 10. Coil 14, coil carrier 15 and yoke 16 are situated outside bearing sleeve 11. Bearing sleeve 11, cup-shaped housing part 50, coil 14, coil carrier 15 and yoke 16 are inserted into an injection mold, and extrusion-coated with a plastic compound 52, so that they are fixed in place in electromagnetic switching device 10. Cup-shaped housing part 50 is closed with the aid of a conical guiding element 51, in which a pressure pin 19 is guided. Pressure pin 19 is movable axially along an axis A.
(13) FIG. 2a shows an electromagnetic switching device 10 according to the present invention according to a first specific embodiment. One-piece component 100, which is made from a material with the aid of a forming process, is shown in FIGS. 2b and 2c. This component includes electromagnet casing 12, bearing sleeve 11 and pole core 17. Pole core 17 is formed on outer diameter 22 of bearing sleeve 11. Coil 14, coil carrier 15, yoke 16 and an intermediate segment 18, which separates pole core 17 and yoke 16 from each other, are inserted between bearing sleeve 11 and electromagnet casing 12. Bearing 21 in which pressure pin 19 is movably guided along axis A, and movably supported magnetic armature 13, which is closed by pressing in flux-conducting components 40, are inserted into inside 24 of bearing sleeve 11. Bearing sleeve 11 is closed on one side by a cover 23, which is also formed by the forming process.
(14) FIG. 3a shows an electromagnetic switching device 10 according to the present invention according to a second specific embodiment. One-piece component 100, which is made from a material with the aid of a forming process, is shown in FIGS. 3b and 3c. In this specific embodiment, the component includes electromagnet casing 12, bearing sleeve 11, pole core 17 and yoke 16. Pole core 17 and yoke 16 are formed on outer diameter 22 of bearing sleeve 11. Since yoke 16 in this specific embodiment is formed directly on outer diameter 22 of bearing sleeve 11, one-piece component 100 is closed at the upper end by a yoke plate 31. A bearing, advantageously a friction bearing 30, may also be provided in bearing sleeve 11, which is used to support or guide magnetic armature 13. All other components which are also present in electromagnetic switching device 10 are positioned in the same way as in the preceding specific embodiment.
(15) FIG. 4a shows an electromagnetic switching device 10 according to the present invention according to a third specific embodiment. One-piece component 100, which is made from a material with the aid of a forming process, is shown in FIG. 4b. In this specific embodiment, the component includes electromagnet casing 12 and bearing sleeve 11. FIG. 4c shows pole core 17, which in this specific embodiment is mounted as a separate component on outer diameter 22 of bearing sleeve 11. All other components which are also present in electromagnetic switching device 10 are positioned in the same way as in the preceding specific embodiments.
LIST OF REFERENCE NUMERALS
(16) 10 electromagnetic switching device 11 bearing sleeve 12 electromagnet casing 13 magnetic armature 14 coil 15 coil carrier 16 yoke 17 pole core 18 intermediate segment 19 pressure pin 21 bearing 22 outer diameter 23 cover 24 inside of the bearing sleeve 30 friction bearing 31 yoke plate 40 flux-conducting component 50 cup-shaped housing part 51 conical guiding element 52 plastic compound 100 one-piece component A axis
