DE102018001243A1 - Bistable electromagnetic lifting actuator and wire drawing machine - Google Patents

Abstract

The invention relates to a bistable electromagnetic lifting actuator (10), comprising a housing (20) with an armature space (25), an armature (30) with a plunger (35) movable along a longitudinal axis (15) in the armature space (25) is and a first stable end position (11) and a second stable end position (12), an excitation coil (40) which is arranged in the armature space (25) and the armature (30) at least partially surrounds and when energized the armature (40). 30) moves into the first end position (11) or the second end position 12, a permanent magnet (50) which is arranged in the armature space (25) and a compression spring (60) through which the armature (30) in the first end position ( 12), wherein the permanent magnet (50) transmits a magnetic flux to the armature (30) to form a magnetic circuit in the first stable end position (11) and in the second stable end position (12), and wherein the armature (30) in the first stable end position (11) and in the second stable end position End position (12) closes the magnetic circuit and is kept permanently magnetic by the permanent magnet (50).

Description

The present invention relates to a bistable electromagnetic lifting actuator according to claim 1, which has a first stable end position and a second stable end position for strong permagnetic holding of the armature in both directions of movement of the armature and a wire drawing machine with such an electromagnetic lifting actuator according to claim 17.

Electromagnetic lifting actuators in different configurations are previously known from the prior art. Such Hubaktoren are known for example as Umkehrhubmagnet having two excitation coils. By energizing one of the excitation coils, an armature in the lifting actuator is moved from a first end position to a second end position and vice versa, the armature being held in the respective end position by continuous energization of one of the two exciter coils.

Out DE 4439695 C2 is a monostable Hubaktor with a first excitation coil, a second excitation coil and a permanent magnet previously known. The permanent magnet holds the armature after energizing the first field coil in a first stable end position, wherein the provision of the armature is effected by energizing the second field coil.

A disadvantage of the known from the prior art electromagnetic Hubaktoren has been found that such Hubaktoren no strong permanent magnetic holding the armature in the first end position and the second end position allow and simultaneously perform the greatest possible mechanical work in both delivery directions. Also, such Hubaktoren have proven to be vulnerable to external influences, for example, if the Hubaktor is blocked or damped in one of the directions of movement, since there is no longer guaranteed a fast switching. In particular, lifting actuators of wire drawing machines require particularly large forces during delivery, but also have to provide large holding forces in the respective end positions and be robust against possible blockage or damping while ensuring rapid switching. Another disadvantage of known from the prior art Hubaktoren is in the large design.

It is therefore an object of the present invention to provide a bistable electromagnetic Hubaktor that allows a strong permanent magnetic holding in the two end positions, a small and compact design realized while maximizing performance, robust and reliable in operation switches, especially in view of external influences, for. Damping or blockage, and is inexpensive to manufacture.

These objects are achieved by a bistable electromagnetic lifting actuator with the features of claim 1 and by a wire drawing machine having the features of claim 17.

The dependent claims have advantageous developments of the invention to the content.

The bistable electromagnetic lifting actuator according to the invention comprises a housing with an armature space, an armature guided on a plunger, which is movable along the longitudinal axis in the armature space and has a first stable end position and a second stable end position, an exciter coil, which is arranged in the armature space and The armature at least partially surrounds and moves when energizing the excitation coil, the armature in the first end position and in the second end position, a permanent magnet which is arranged in the armature space and a compression spring, by which the armature is biased in the first end position on. The permanent magnet transmits a magnetic flux to form a magnetic circuit in the first stable end position and in the second stable end position on the armature and the armature closes in the first stable end position and the second stable end position of the magnetic circuit and is thus held by the permanent magnet permanent magnet. The bistable electromagnetic Hubaktor invention is characterized in contrast to the known from the prior art Hubaktoren in that only a single permanent magnet is provided, the permanent magnet in both the first end position, as well as in the second end position by means of a magnetic circuit formed holds. The magnetic flux of the permanent magnet is transmitted in the armature space regardless of the position of the armature in the longitudinal axis of the armature, so that in the first stable end position and in the second stable end position of the magnetic circuit is closed. The direction of the feed movement of the armature takes place in dependence of a Bestromungsrichtung the excitation coil. The inventive bistable electromagnetic Hubaktor is thus also a bidirectional Hubaktor.

An advantage that results over the classic bistable reversible lift magnets is a strong asymmetry in the required power, with the mechanical performance performed being similar in both directions of movement. In a feed movement in the first end position helps with a very low electric power, the spring in the feed movement, while in the feed movement in the second end position at energization of the excitation coil of the armature counter to the holding force of the permanent magnet and the compression spring in the second stable is moved to be kept there permanently magnetically by the permanent magnet. The permanent magnetic holding in the first end position and the second end position has over the conventional spring stores a significantly increased holding power.

In a further embodiment, it has proved to be advantageous if a first stop and a second stop for the armature are provided in the armature space, wherein the first stop defines the first stable end position and the second stop the second stable end position. The first stop and the second stop are therefore designed such that they mechanically predetermine the end position of the armature in the longitudinal axis and in the respective end position in operative contact, particularly preferably in two-dimensional operative contact in a plane perpendicular to the longitudinal axis with the armature. The areal effective contact is to be embodied in particular in such a way that the resulting forces do not exceed the strength limits of the materials used in the sudden braking of the armature. Alternatively, an air gap may be provided in the respective end position between the armature and the first stop or the second stop, wherein the armature is braked by damping means accordingly.

According to a further embodiment of the present invention, it has proved to be advantageous if the first stop and the second stop are formed from a soft magnetic material and form part of the magnetic circuit. Due to the surface contact between the armature with the first stop in the first stable end position or with the second stop in the second stable end position of the magnetic circuit is closed and the armature is permanently magnetically held to the respective stop, whereby particularly high holding forces are realized.

It is also advantageous if the permanent magnet is arranged in the longitudinal axis between the first stop or the second stop and the exciter coil. In the armature space thus the stops and the permanent magnet and the exciter coil are arranged in a row, resulting in a particularly compact design.

Moreover, it is further preferred particularly advantageous if the permanent magnet is arranged in the longitudinal axis spaced from the first stop or the second stop. The distance between the permanent magnet and the stop may for example be formed as an air gap or filled with a non-magnetic filler.

According to a further particularly preferred embodiment of the present invention, it is provided that in the armature space between the permanent magnet and the armature to the permanent magnet, a sliding bearing is provided, through which the armature is movably supported in the armature space in the longitudinal axis. By forming such a slide bearing in the armature space, a particularly good utilization of the available space of the bistable electromagnetic Hubaktors is realized, at the same time particularly large slide bearing surfaces can be provided to accommodate large lateral forces to the longitudinal axis can, without in corresponding through holes the housing separate bearings must be anticipated, which increase the length unnecessarily. The magnetic flux of the permanent magnets is thus passed through the sliding bearing, which is particularly preferably designed as a planar sliding bearing in the armature or the plunger, wherein particularly preferably the smallest possible air gap between the sliding bearing and the armature or the plunger is provided to make the flux transition of the magnetic flux particularly favorable. The slide bearing may alternatively be formed by the permanent magnet. More preferably, a flux guide can be arranged between the sliding bearing and the permanent magnet.

Also, it has proven to be particularly advantageous if the permanent magnet is formed from a plurality of individual permanent magnets, which particularly preferably have a simple to produce and inexpensive cuboid shape.

Furthermore, it has proved to be particularly advantageous if the housing is made of a soft magnetic material and together with the first stop on the one hand and the second stop on the other hand forms the magnetic circuit. The housing may be formed in one or more parts, wherein the individual housing parts are particularly preferably connected by means of screw.

It is preferred if the compression spring is arranged on the side facing away from the armature space side of the first stop or the second stop. The compression spring is further preferably in operative contact at one end with the housing and at the other end with the plunger so that the armature is biased by the compression spring in the first end position.

Moreover, it is also advantageous if the plunger has a spring plate, which is on the side facing away from the first stop or the second stop in operative connection with the compression spring. The spring plate may be integrally worked on the plunger or molded or by means of appropriate compounds form, force or materially connected to the plunger.

According to a further particularly preferred embodiment of the present invention, it is provided that the components forming the magnetic circuit are wholly or partly made of a plurality of baked single sheets, which enables effective suppression of eddy currents.

It has also proven to be advantageous if the side facing the armature of a bobbin of the exciter coil and / or the armature have a substantially rectangular cross-section. It is particularly preferred if also the housing has a substantially rectangular, more preferably a square cross-section.

According to a further embodiment of the present invention, it is particularly advantageous if a plurality of armature spaces is provided in the housing, wherein an armature, an exciter coil and a permanent magnet are provided in each armature space, and that the respective armatures are coupled together by means of the armature piston. By arranging a plurality of such trained in the longitudinal axis of the electromagnetic actuators, the force can be increased on the one hand at a constant stroke of the bistable electromagnetic Hubaktors. On the other hand, by a double use of components, a particularly compact design can be realized with the greatest possible force. Particularly preferably, two, three or any number of anchor spaces are provided along the longitudinal axis, wherein according to a further preferred embodiment, means are provided which allow the manner of a modular system to extend the bistable electromagnetic Hubaktor to any number of actuators, whereby the force of can be assembled by a modular system bistable electromagnetic Hubaktors according to the application.

It is also advantageous if the excitation coil is operated for the process in the first end position and the process in the second end position with constant current, and wherein particularly preferably the excitation coil is energized for moving the armature in the second end position by means of a capacitor discharge.

A further advantageous embodiment of the present invention provides that one end of the plunger is coupled to a tool, in particular a gripping tool.

Another aspect of the present invention relates to a wire drawing machine with a bistable electromagnetic Hubaktor invention.

• 1: eine teilweise geschnittene Darstellung eines bistabilen elektromagnetischen Hubaktors gemäß einem ersten Ausführungsbeispiel mit einem Gehäuse, das einen Ankerraum umschließt und in dem ein auf einem Stößel in der Längsachse beweglicher Anker angeordnet ist, und an einem ersten Anschlag durch einen Permanentmagnet permanentmagnetisch in einer ersten stabilen Endlage gehalten ist,
• 2: den bistabilen elektromagnetischen Hubaktor gemäß 1, wobei der Anker in der Längsachse in eine zweiten stabile Endlage verschoben ist und in dieser durch den selben Permanentmagneten permanentmagnetisch gehalten ist,
• 3: eine perspektivische teilweise geschnittene Darstellung eines zweiten Ausführungsbeispiels des bistabilen elektromagnetischen Hubaktors, wobei in dem Gehäuse des bistabilen magnetischen Hubaktors eine Vielzahl von Ankerräumen mit jeweils einem Anker, einer Erregerspule und einem Permanentmagneten angeordnet sind und wobei die Anker mittels eines Stößels gekoppelt sind,
• 4: eine teilweise geschnittene Darstellung des bistabilen elektromagnetischen Hubaktors gemäß 3, wobei sich die mit dem Stößel verbundenen Anker jeweils in der ersten stabilen Endlage befinden, und
• 5: eine teilweise geschnittene Darstellung des bistabilen elektromagnetischen Hubaktors gemäß 3, wobei die Anker sich in der zweiten stabilen Endlage befinden.

Hereinafter, two preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. In the drawing shows:

• 1 a partially sectioned view of a bistable electromagnetic Hubaktors according to a first embodiment with a housing which encloses an armature space and in which a plunger in the longitudinal axis movable armature is disposed, and at a first stop by a permanent magnet permanent magnetically in a first stable end position is held,
• 2 : the bistable electromagnetic lifting actuator according to 1 wherein the armature is displaced in the longitudinal axis in a second stable end position and is held in this permanent magnet by the same permanent magnet,
• 3 FIG. 2: shows a perspective, partially sectioned illustration of a second exemplary embodiment of the bistable electromagnetic lifting actuator, in the housing of the bistable magnetic lifting actuator a plurality of armature spaces each having an armature, an excitation coil and a permanent magnet, and wherein the armatures are coupled by means of a tappet,
• 4 FIG. 2: a partially sectioned illustration of the bistable electromagnetic lifting actuator according to FIG 3 , wherein the anchors connected to the plunger are each in the first stable end position, and
• 5 FIG. 2: a partially sectioned illustration of the bistable electromagnetic lifting actuator according to FIG 3 , wherein the anchors are in the second stable end position.

The following is with reference to the 1 to 2 a bistable electromagnetic lifting actuator 10 according to a preferred embodiment of the invention described in detail.

The 3 to 5 show a second embodiment of the bistable electromagnetic Hubaktors invention 10 , Unless otherwise indicated, identical or functionally identical parts are provided with the same reference numerals.

This in 1 illustrated embodiment of a bistable electromagnetic Hubaktors 10 has a cuboid housing 20 on, that's an anchor room 25 encloses. The housing 20 is along a longitudinal axis 15 arranged and has one end a first lid part 23 and other ends a second cover part 24 on. In the first cover part 23 and the second lid part 24 is in each case centric to the longitudinal axis 15 a passage opening 26 molded or incorporated.

In the interior of the case 20 are in the anchor room 25 an excitation coil 40 , an anchor 30 and a permanent magnet 50 arranged. The exciter coil 40 is on a bobbin 41 wrapped and with this firmly with the housing 20 connected. The bobbin 41 is made of a non-magnetic material and holds the exciting coil 40 spaced from the second lid part 24 and the anchor 30 ,

The permanent magnet 50 is on the anchor space 25 facing side of the housing 20 firmly on the housing 20 arranged and in the longitudinal axis 15 spaced from the exciter coil 40 arranged. As in 1 is shown, are two permanent magnets 50 on opposite sides on the anchor space 25 facing side of the housing 20 arranged, with particular preference, each permanent magnet 50 from a variety of square or rectangular Einzelpermanentmagneten 51 may be formed, which are simple and inexpensive to manufacture.

On the longitudinal axis 15 facing side of the permanent magnet 50 are on the anchor 30 facing side a flux guide 55 and a plain bearing 56 arranged. The flux guide 55 is made of a soft magnetic material and conducts the magnetic flux from the permanent magnet 50 to the anchor 30 , The plain bearing 56 is formed as thin as possible and can be made for example of a plurality of sliding blocks, brass or a composite material.

The plain bearing 56 is designed such that this one hand, the rectangular in cross section anchor 30 in the longitudinal axis 15 as large as possible in the form of a planar plain bearing 56 stores and on the other hand, the magnetic flux through a particularly small air gap on the anchor 30 transfers. The plain bearing 56 is dimensioned longer in the longitudinal direction than the possible stroke of the anchor 30 between the first stop 21 and the second stop 22 along the longitudinal axis 15 , Thus, the plain bearing transmits 56 in all possible positions of the anchor 30 in the anchor room 25 the magnetic flux from the sliding bearing 56 on the anchor 30 ,

The permanent magnet 50 , the flux guide 55 as well as the plain bearing 56 are in the longitudinal axis 15 spaced from the first lid part 23 and the second lid part 24 arranged, whereby between the lid part 23 and the permanent magnet 50 and the sliding bearing 56 an air gap is arranged, which may be, for example, by a non-magnetic filler, such as a resin, poured out.

Like next 1 it can be seen in the anchor space 25 the anchor 30 along the longitudinal axis 15 between the first lid part 23 and the second lid part 24 movable, with the first cover part 23 a first stop 21 for the anchor 30 forms and the second cover part 24 a second stop 22 for the anchor 30 on the opposite side of the housing along the longitudinal axis 15 forms. The bistable electromagnetic lifting actuator 10 is thus a bidirectional lifting actuator, wherein the actuation in both directions by the exciter coil 40 he follows.

The anchor 30 is on a pestle 35 arranged, whose free end 37 can be coupled with a (not shown) tool, such as a gripper of a wire drawing machine. The anchor 30 is stuck with the pestle 35 connected, causing a movement of the armature 30 in the longitudinal axis 15 on the pestle 35 is transferred and the plunger 35 the movement of the anchor 30 along the longitudinal axis 15 follows. The pestle 35 corresponds to the passage opening 26 of the first cover part 23 and the second lid part 24 and is thus through the through hole 26 of the first cover part 23 and the second lid part 24 friction-free or low-friction guided.

The pestle 35 also points to one of the housing 20 opposite end of a spring plate 36 on. Between the spring plate 36 and the housing 20 or its first cover part 23 , is a compression spring 60 arranged through which the anchor 30 against the first stop 21 is pressed, and in this position flat against the first stop 21 or the first cover part 23 is applied. Between the first stop 21 and the anchor 30 is preferably an air gap in the order of less than 1mm, for example, O, lmm. This is set by a damping means - as will be explained in more detail below.

In the 1 shown position of the anchor 30 in the anchor room 25 corresponds to a first stable end position 11 of the anchor 30 , In the first stable end position 11 becomes the anchor 30 permanently magnetic on the first stop 21 held. For this lies the anchor 30 almost flat on the first stop 21 on, whereby a magnetic circuit is closed, on the one hand, starting from the permanent magnet 50 through the plain bearing 56 , the anchor 30 and the case 20 or the housing 20 together with the lid part 23 is formed. The housing 20 thus forms together with the first stop 21 an iron yoke.

In the first stable end position 11 is the anchor 30 on the one hand by means of the compression spring 60 and on the other hand kept permanently magnetic. To the anchor 30 in a second stable end position 12 , what a 2 shown, must pass through the exciter coil 40 applied force to be greater than the spring force of the compression spring 60 and the permanent magnetic holding force in the first stable end position 11 ,

The exciter coil 40 is energized for a short time, preferably by means of a capacitor discharge, whereby the armature 30 against the permanent magnetic holding force in the first stable end position 11 and by the compression spring 60 applied holding force along the longitudinal axis 15 in the second stable end position 12 is moved. The anchor 30 is before reaching the second stable end position 12 braked by a damping means, so that the anchor 30 there only approximately flat, with an air gap of less than 1mm preferably 0.1mm, at the stop 22 rests. This is the compression spring 60 between the spring plate 36 and the housing 20 compressed or biased.

In the second stable end position 12 which off 2 it can be seen, is the anchor 30 flat on the second stop 22 on, passing through the second cover part 24 is formed. Due to the surface contact between the anchor 30 and the second lid part 24 of the housing 20 the magnetic circuit is now on the part of the second stable end position 12 closed, causing the anchor 30 against the spring force of the compression spring 60 is held in this.

To the anchor 30 back to the first stable end position 11 to convict, the excitation coil is energized again preferably in constant current operation, whereby the armature 30 from the second stable end position 12 in the first stable end position 11 is moved. This will be the movement of the anchor 30 through the preloaded compression spring 60 supported. The anchor 30 is about to reach the stable end position 11 by means of the damping means, which preferably outside the armature space 25 is arranged, braked, causing the anchor 30 about 0.1mm before the stop 21 the stable end position 11 occupies.

Adjusting the anchor 30 from the first stable end position 11 in the second stable end position 12 can be realized by the capacitor discharge, while the adjustment of the second stable end position 12 back to the first stable end position 11 can be realized over a longer time by means of a conventional constant current source with a significantly lower power. Due to the bias of the compression spring 60 However, the mechanical work done for both directions of movement of the anchor 30 in the same order of magnitude. A delayed or slow switching of the bistable electromagnetic lifting actuator 10 in a blockade or damping by external influences of the plunger 35 or the tool at the free end 37 is thus reliably possible.

The housing 20 , as well as the exciter coil 40 , the coil carrier 41 , the permanent magnet 50 , the plain bearing 56 and the anchor 30 have matched rectangular cross-sections, whereby the housing 20 can be inexpensively made of a variety of plate-shaped bodies, which, for example by means of screw, can be connected to each other.

The cuboid configuration of the bistable electromagnetic Hubaktors 10 is particularly in the perspective sectional view in 3 recognizable by a second embodiment of the invention.

The bistable electromagnetic lifting actuator 10 according to 3 is particularly powerful and consists of a housing 20 with three along the longitudinal axis 15 arranged in series anchor spaces 25 , In each of the anchor spaces 25 becomes an actor through an anchor 30 , an excitation coil 40 and a permanent magnet 50 with a plain bearing 56 educated. Between two adjacent anchor spaces 25 is an iron back part 28 arranged between two adjacent anchor spaces 25 on a first anchor space 25 facing side a first stop 21 forms and on a second anchor space 25 facing side a second stop 22 forms. The iron back part 28 is thus used twice for two adjacent actuators, whereby length of the bistable electromagnetic Hubaktors 10 is saved. The anchors 30 are over the pestle 35 coupled together.

The operation of the bistable electromagnetic lifting actuator 10 according to the 3 to 5 is analogous to that in the 1 and 2 illustrated embodiment.

4 shows the bistable electromagnetic lifting actuator 10 in a first stable end position 11 , Meanwhile 5 the bistable electromagnetic lifting actuator 10 in the second stable end position 12 can be seen.

The in the 3 to 5 shown bistable electromagnetic Hubaktor 10 is not limited to three actuators. Rather, in the context of this invention, it is envisaged to provide a type of modular system, whereby any number of actuators along a longitudinal axis 15 can be connected in series to provide extra power when adjusting. For this purpose, appropriate means may be provided to modular like switching further actuators in series and the respective anchors 30 by means of the plunger 35 to pair.

Thus, according to the invention is a bistable electromagnetic Hubaktor 10 provided that allows a bilateral permanent magnetic holding with a large holding force. The bistable electromagnetic Hubaktor invention 10 has a strong asymmetric power requirement, which is particularly advantageous if one of the directions of movement of the armature 30 is blocked or damped by external influences and a quick two-sided switching is not possible. The spring force of the compression spring 60 and the reduced power demand allow, despite damping, a corresponding damped or slow feed movement of the armature 30 or the plunger 35 to do the work. In addition, a particularly high power density with minimal space requirements, a high degree of robustness and a cost-effective design are realized.

LIST OF REFERENCE NUMBERS

10

Bistable electromagnetic lifting actuator

11

first stable end position

12

second stable end position

15

longitudinal axis

20

casing

21

first stop

22

second stop

23

first cover part

24

second cover part

25

armature space

26

Through opening

28

Iron yoke part

30

anchor

35

tappet

36

spring seat

37

free end

40

excitation coil

41

coil carrier

50

permanent magnet

51

Single permanent magnet

55

flux conductor

56

bearings

60

compression spring

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4439695 C2 [0003]

Claims (17)

A bistable electromagnetic lift actuator (10), comprising: - a housing (20) having an armature space (25), - an armature (30) having a plunger (35) which is movable along a longitudinal axis (15) in the armature space (25) and a first stable end position (11) and a second stable end position (12), - an excitation coil (40) which is arranged in the armature space (25) and surrounds the armature (30) at least in some areas and, when energized, the armature (40). 30) in the first end position (11) or the second end position 12 moves, - a permanent magnet (50) which is arranged in the armature space (25), - a compression spring (60) through which the armature (30) in the first End position (12) is held biased, characterized in that - the permanent magnet (50) transmits a magnetic flux to form a magnetic circuit in the first stable end position (11) and in the second stable end position (12) on the armature (30), and that - the armature (30) in the first stable end position (11) and in the second s stable end position (12) closes the magnetic circuit and is kept permanently magnetic by the permanent magnet (50). Bistable electromagnetic lifting actuator (10) according to Claim 1 , characterized in that a first stop (21) and a second stop (22) for the armature (30) are provided, and that the first stop (21) the first stable end position (11) and the second stop (22) pretend second stable end position (12) in the longitudinal axis (15). Bistable electromagnetic lifting actuator (10) according to Claim 1 or 2 , characterized in that the first stop (21) and the second stop (22) are part of the magnetic circuit. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the permanent magnet (50) in the longitudinal axis (15) between the first stop (21) or the second stop (22) and the excitation coil (40) is arranged. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the permanent magnet (50) in the longitudinal axis (15) spaced from the first stop (21) or the second stop (22) is arranged. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that in the armature space (25) between the permanent magnet (50) and the armature (30) on the permanent magnet (50), a sliding bearing (56) is formed by the the armature (30) is movably mounted in the armature space (25) along the longitudinal axis. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the permanent magnet (50) is formed of a plurality of Einzelpermanentmagneten (51). Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the compression spring (60) on the side remote from the armature space (25) side of the first stop (21) or the second stop (22) is arranged. Bistable electromagnetic lifting actuator (10) according to any one of the preceding claims, characterized in that the plunger (35) has a spring saddle (36) which is arranged on the side facing away from the first stop (21) or the second stop (22) and that the armature (30) is biased by the spring saddle (36). Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the components forming the magnetic circuit are wholly or partly made of baked individual sheets. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the housing (20) is soft magnetic and together with the first stop (21) and the second stop (22) forms the magnetic circuit. Bistable electromagnetic lifting actuator (10) according to one of the preceding claims, characterized in that the armature (30) has a rectangular cross-section. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the housing (20) has a plurality of anchor spaces (25) that in each armature space (25) has an armature (30), an excitation coil (40) and a Permanent magnet (50) are seen, and that the armature (30) by means of the plunger (35) are coupled. Bistable electromagnetic Hubaktor (10) according to any one of the preceding claims, characterized in that the housing (20) has a square cross-section. Bistable electromagnetic Hubaktor (10) according to one of the preceding claims, characterized characterized in that the exciter coil (40) is energized by means of a capacitor discharge. Bistable electromagnetic lifting actuator (10) according to one of the preceding claims, characterized in that at one end (37) of the plunger (35) a tool, in particular a gripping tool, is arranged. Wire drawing machine with a bistable electromagnetic lifting actuator (10) according to one of the preceding claims.

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