Electromagnetic actuator as well as actuating system

Patent metadata

Field	Value
Publication number	US-10607758-B2
Application number	US-201616061838-A
Country	US
Kind code	B2
Filing date	Nov 23, 2016
Priority date	Dec 14, 2015
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

An electromagnetic positioning device (1), having a stationary spool unit (9), having a moveably guided anchor (2), which forms a positioning section (14) and which can be axially displaced along a displacement axis (V) in response to supplying the spool unit (9) with current, as well as having a one-part cup-shaped yoke-core element (3), which receives the anchor (2) and which includes a core section (5) as well as a yoke section (6) and which has a yoke-core bottom (4) extending perpendicular to the displacement axis (V) and a yoke-core sheath extending perpendicular to the yoke-core bottom (4) along the displacement axis (V), a longitudinally cut transition area (8) reduced in thickness and arranged between the core section (5) and the yoke section (6) being realized in the yoke-core sheath. It is intended that a guide pin (17) for the anchor (2) is fixed, preferably pressed in, in a, preferably centric, guide pin recess (18) in the yoke-core bottom (4) and protrudes axially into a, preferably centric, guide opening (13) of the anchor (2) and can be displaced relative to the anchor (2) during its displacement movement.

First claim

The invention claimed is:

1. An electromagnetic positioning device ( 1 ), having a stationary spool unit ( 9 ), having a moveably guided anchor ( 2 ), which forms a positioning section ( 14 ) and which can be axially displaced along a displacement axis (V) in response to supplying the spool unit ( 9 ) with current, as well as having a one-part cup-shaped yoke-core element ( 3 ), which receives the anchor ( 2 ) and which comprises a core section ( 5 ) as well as a yoke section ( 6 ) and which has a yoke-core bottom ( 4 ) extending perpendicular to the displacement axis (V) and a yoke-core sheath extending perpendicular to the yoke-core bottom ( 4 ) along the displacement axis (V), a longitudinally cut transition area ( 8 ) reduced in thickness and arranged between the core section ( 5 ) and the yoke section ( 6 ) being realized in the yoke-core sheath,
wherein
a guide pin ( 17 ) for the anchor ( 2 ) is fixed in a guide pin recess ( 18 ) in the yoke-core bottom ( 4 ) and protrudes axially into a guide opening ( 13 ) of the anchor ( 2 ) and can be displaced relative to the anchor ( 2 ) during its displacement movement.

2. The electromagnetic positioning device ( 1 ) according to claim 1 , wherein on the yoke-core element ( 3 ), a sliding bearing ( 21 ) is fixed for guiding the anchor ( 2 ) on its outer circumference.

3. The electromagnetic positioning device according to claim 1 , wherein an anti-twist pin ( 16 ) extending parallel to the guide pin ( 17 ) is arranged adjacent to the guide pin ( 17 ) and is fixed in an anti-twist pin recess ( 19 ) in the yoke-core bottom ( 4 ).

4. The electromagnetic positioning device according to claim 1 , wherein the yoke-core bottom ( 4 ) forms a direct or indirect axial terminal abutment for the anchor ( 2 ) or a support surface for an abutment attenuation element.

5. The electromagnetic positioning device according to claim 1 , wherein the anchor ( 2 ) is axially arranged between the yoke-core bottom ( 4 ) and a washer element ( 25 ) penetrated by the anchor ( 2 ), said washer element ( 25 ) being fixed in an inner circumferential groove ( 26 ) of the yoke-core element ( 3 ).

6. The electromagnetic positioning device according to claim 5 , wherein the washer element ( 25 ) is realized as a spring lock washer.

7. The electromagnetic positioning device ( 1 ) according to claim 1 , wherein on the anchor ( 2 ), an abutment attenuation element is fixed via which the anchor ( 2 ) is supported in at least one terminal abutment position on an immobile component.

8. The electromagnetic positioning device according to claim 1 , wherein in its positioning section ( 14 ), the anchor ( 2 ) carries a rolling bearing ( 15 ) realized as a ball bearing.

9. The electromagnetic positioning device according to claim 1 , wherein the anchor ( 2 ) is made of multiple parts and comprises a guide section ( 12 ), which comprises the guide opening ( 13 ) and on which a push rod section, which comprises the positioning section ( 14 ) and which is made of one or multiple parts and has a smaller diameter than the guide section ( 12 ), is fixed.

10. The electromagnetic positioning device according to claim 1 , wherein the spool unit ( 9 ) is supplied or can be supplied with current via a control in such a manner that the anchor ( 2 ) moves axially along the displacement axis towards the yoke-core bottom ( 4 ) upon supply with current.

11. The electromagnetic positioning device according to claim 1 , wherein the yoke-core element ( 3 ) and the spool unit ( 9 ) are arranged in a current-conductive casing ( 10 ).

12. A positioning system, comprising an electromagnetic positioning device ( 1 ) according to claim 1 , as well as a positioning partner, which is realized in the anchor ( 2 ) so as to introduce a torque around the displacement axis (V) via a rolling bearing ( 15 ) fixed on the anchor ( 2 ).

13. The electromagnetic positioning device according to claim 1 , wherein an internal sliding bearing is arranged on the anchor ( 2 ) in order to axially guide the anchor ( 2 ) on the outer circumference of the guide pin ( 17 ).

14. The electromagnetic positioning device according to claim 2 , wherein the sliding bearing ( 21 ) is fixed on the inner circumference of the yoke section ( 6 ).

15. The electromagnetic positioning device according to claim 6 , wherein the spring lock washer is made of a material which does not conduct magnetic flow.

16. The electromagnetic positioning device according to claim 15 , wherein the material is bronze.

17. The electromagnetic positioning device according to claim 9 , wherein the guide opening ( 13 ) is a through opening.

18. The electromagnetic positioning device according to claim 9 , wherein the push rod section is fixed in the guide opening ( 13 ).

Assignees

• Eto Magnetic Gmbh

Inventors

• Eckhardt Harald
• Bender Stefan

Classifications

• H01F7/081

  Magnetic constructions · CPC title

• H01F7/13

  characterised by pulling-force characteristics · CPC title

• H01F2007/163

  with axial bearing · CPC title

• H01F7/1607 Primary

  Armatures entering the winding · CPC title

• H01F2007/085

  Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material · CPC title