Electromagnetic actuating device which is monostable in the currentless state and use of such an actuating device

Patent metadata

Field	Value
Publication number	US-10832845-B2
Application number	US-201716092939-A
Country	US
Kind code	B2
Filing date	Mar 30, 2017
Priority date	Apr 13, 2016
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

An electromagnetic actuating device includes an armature, which has a permanent magnet and can move along a longitudinal axis between actuation positions relative to a stationary coil and in reaction to energization, armature has an engagement section for interacting with a plunger, and which armature can move from a first actuation position, which is stable in the currentless state, into a second actuation position against a restoring force of a spring, wherein the coil has a first coil unit, which acts on the armature and which releases the armature from the first actuation position, wherein the coil has a second coil unit which, during movement, applies to the armature a force which accelerates the armature, and wherein the coil has a restoring coil such that when the armature is returned from the second into the first actuation position, the restoring coil boosts the restoring force of the spring.

First claim

The invention claimed is:

1. An electromagnetic actuating device, which is monostable in the currentless state, comprising an armature unit ( 12 ), which has permanent magnetic means ( 16 ) and which can move along a movement longitudinal axis ( 10 ) between at least two actuation positions relative to stationary coil means ( 28 , 50 , 36 ) and in reaction to energization thereof,
which armature unit ( 12 ) has an engagement section ( 26 ) for interacting with a plunger section ( 22 ), which provides an actuation partner
and which armature unit ( 12 ) can be moved from a first of the actuation positions, which is stable in the currentless state as result of an effect of the permanent magnetic means, into a second of the actuation positions against a restoring force of force storage means ( 44 ),
wherein the coil means have a first coil unit ( 28 ), which is connected or can be connected in order to bring about a force, which acts on the armature unit and which releases the armature unit from the first actuation position, wherein
the coil means have a second coil unit ( 36 ), which is provided in addition to the first coil unit and is connected or can be connected in such a way that during the movement, the second coil unit applies to the armature unit a force, which accelerates the armature unit, and wherein the coil means have restoring coil means ( 50 , 28 , 36 ), which are embodied and/or connected in such a way that when the armature unit is returned from the second into the first actuation position, said restoring coil means ( 50 , 28 , 36 ) boost the restoring force of the force storage means.

2. The device according to claim 1 , wherein the restoring force of the force storage means acting on the armature unit at the second actuation position is greater than a permanent magnetic adhesive force of the permanent magnetic means ( 16 ) at the second actuation position.

3. The device according to claim 1 , wherein the restoring coil means are realized as additional coil unit ( 50 ).

4. The device according to claim 3 , wherein the additional coil unit is provided in the area of the second actuation position and/or acts on the armature unit in a restoring manner.

5. The device according to claim 3 , wherein the additional coil unit ( 50 ) is provided axially adjacent to the second coil unit ( 36 ), and/or is provided so as to magnetically interact with a stationary core section ( 42 ) assigned to the second coil unit.

6. The device according to claim 5 , wherein the additional coil unit ( 50 ) is on a joint coil carrier.

7. The device according to claim 1 , wherein energizing means are connected upstream or can be connected upstream of the first coil unit and the second coil unit in such a way that, in the case of the armature unit being located in the second actuation position, a continued energization of the first and of the second coil unit takes place, which introduces a lower current, in particular decreased by at least 20%, more preferably by at least 40%, into the first and second coil unit as compared to an energization, which follows during the movement into the second actuation position.

8. The device according to claim 7 , wherein the lower current is decreased by at least 20% as compared to the energization which follows during the movement into the second actuation position.

9. The device according to claim 7 , wherein the lower current is decreased by at least 40% as compared to the energization which follows during the movement into the second actuation position.

10. The device according to claim 1 , wherein the restoring coil means are realized by the first and/or second coil unit and have polarity changing means ( 60 - 66 ), which act on this coil unit(s).

11. The device according to claim 1 , wherein the force storage means are realized as compression spring ( 44 ) acting on the armature unit in the area of the engagement section.

12. The device according to claim 11 , wherein the compression spring engages externally with the armature unit via deflecting means ( 46 ) via a tilt lever.

13. The device according to claim 11 , wherein the compression spring is integrated in a housing of the electromagnetic actuating device and/or encompasses the plunger section axially adjacent to the permanent magnetic means.

14. A use of the electromagnetic actuating device, which is monostable in the currentless state, according to claim 1 , for setting an operating mode of a vehicle unit, wherein the force storage means can establish a defined operating state in the currentless state of the actuating device for moving the armature unit into the first actuation position.

15. The use of claim 14 , wherein the vehicle unit is a motorcycle transmission.

16. The device according to claim 1 , wherein the force storage means ( 44 ) is a spring means.

Assignees

• Eto Magnetic Gmbh

Inventors

• Fangauer Philipp
• Vincon Peter

Classifications

• H01F7/122

  by permanent magnets {(H01F7/1615, H01F7/1646 take precedence)} · CPC title

• H01F7/1615 Primary

  Armatures or stationary parts of magnetic circuit having permanent magnet · CPC title

• H01F7/081

  Magnetic constructions · CPC title

• H01F2007/1692

  Electromagnets or actuators with two coils · CPC title

• H01F2007/086

  Structural details of the armature · CPC title