EP3649657A1

EP3649657A1 - Adjusting device

Info

Publication number: EP3649657A1
Application number: EP18733833.0A
Authority: EP
Inventors: Ludvik Kumar; Franci Lahajnar; Andrej Likar
Original assignee: Kolektor Group doo
Current assignee: Kolektor Group doo
Priority date: 2017-07-03
Filing date: 2018-06-19
Publication date: 2020-05-13
Also published as: WO2019007675A1; DE102017114246A1

Abstract

The invention relates to an adjusting device comprising a housing (1) and at least two electromagnetic linear actuators (2), wherein these each comprise a coil arrangement (3), which is fixed to the housing and extends around a coil axis (X), an armature arrangement (4), which is at least partially received in a cavity (6) arranged within the coil arrangement (3), is movable along the coil axis (X) relative to the coil arrangement (3), and has an axially magnetised permanent magnet (7), and a ram (5), which is actuated by the armature arrangement (4) and is guided displaceably in the housing (1) along a ram axis (Y). At least one of the linear actuators (2) has an offset (a) between the coil axis (X) and the ram axis (Y). The housing (1) comprises a housing portion (13), which is created by overmoulding the coil arrangements (3) with a thermoset material and which has guide regions (53) for the armature arrangements (4) which guide regions are axially offset in relation to the coil arrangements and have support faces (56) made of thermoset material, with the associated armature arrangements (4) resting slidingly against said support faces.

Description

locking device

The present invention relates to an adjusting device comprising a housing and at least two electromagnetic linear actuators, each of which

a housing-fixed coil arrangement extending around a coil axis,

- one at least partially in one within the

Coil arrangement arranged cavity, movable along the coil axis relative to the coil assembly, an axially magnetized

Permanent magnet armature assembly and

- One operated by the armature assembly, in which

Housing displaceable along a ram axis

guided pestle

comprise, wherein at least one of the linear actuators between the coil axis and the plunger axis is an offset.

Such an actuator is known for example from US 2010/0192885 AI. The anchor assemblies here each include one in a bore of a

Core body of the associated coil assembly guided guide rod and a permanent magnet and

Flussleitstückanordnung, which in such a way with the

Guide rod is connected, that it is offset from the coil assembly and adjacent to one of them

End faces extends. The plunger adhere by magnetic force on the free end face of the respective Permamentmagnet- and

Flux assembly, eccentrically, i.

offset to the coil axis. The offset of the respective The ram axis to the coil axis serves to minimize the distance between the two plungers, which is important for various applications of actuators with two operated by electromagnetic linear actuators rams. The case of these known

Adjusting device comprises a base part, in which the plungers are guided displaceably along their axes, and one attached to a collar of the base part

Housing flap, the coil arrangements, the

Anchor assemblies and the projecting from the base portion of the housing in the direction of the armature assemblies protruding end portions of the plunger.

An actuator having only an electromagnetic linear actuator, wherein between the

Coil axis and the ram axis is an offset, US 2011/0133576 AI is removable.

The present invention is directed to provide a control device of the generic type mentioned above, which is characterized by an increased practicality over the prior art

distinguished. The aim is a so far

Actuator, in which even at very high

Force of the linear actuators the plunger one

can have particularly small distance from each other, without affecting the reliability is impaired.

The above object is achieved by the housing by a molding of the

Coil arrangements with a thermoset material

resulting housing portion includes, which axially to The coil assemblies offset guide portions for the armature assemblies having consisting of thermoset material support surfaces on which the respective associated armature assembly is slidably.

The guide according to the invention of the armature arrangements in their respective associated tappet more or less adjacent area on the molded thermoset material housing section can be a particularly large offset of the respective ram axis relative to the associated coil axis realize without the relevant eccentricity of the attack of the plunger the armature assembly leads to the reliability or reliability impairing tilting. Thus, in the interest of a high

Performance of the actuator, d. H. a high force and / or high switching dynamics, coil arrangements with a comparatively large

Diameter are used, but at the same time the distance between the plungers are kept to a minimum. In fact, it is possible in a constructive implementation of the invention that the offset between the ram axis and coil axis is at least as large as the maximum radial

Extension of the permanent magnet with respect to the

Coil axis. Also, the present invention allows the realization of such adjusting devices, in which the distance between the plungers is less than 25% of the plunger diameter and / or less than one millimeter.

In addition to the above-explained, according to the invention

designed housing portion of thermoset, the housing comprises at least one other housing part, namely a (preferably machined from metal)

Housing section in which the plunger are guided displaceably along its axis. Advantageous, especially in terms of manufacturing technology, is one

three-part structure of the housing such that it consists of a metallic base plate, the one attached to it on the first housing portion of thermoset material (s. O.) And on the other side attached thereto metallic second housing portion with the ram guides executed therein. Under

Aspects of an economical production is particularly attractive that a type of a first housing portion (with by encapsulation therein

embedded coil assemblies) can be combined with differently designed second housing sections. In particular, with an embodiment of the first housing portion, its design and

Dimensioning is decisively determined by the coil arrangements, different second housing sections are combined, which differ with respect to the distance of the ram axes to each other. In order to be able to optimally use this advantage of a "modular concept", the connection of the tappet with the respective associated armature arrangement is preferably designed such that it

different large offsets between the coil axis and ram axis are possible.

According to a first preferred embodiment of

Invention grab the plunger and the associated

Anchor arrangement in the region of a tensile connection form fit into each other. Plunger and armature are in this way - with the housing closed - inseparable. Thus, unlike in the case of magnetic adhesion of the respective tappet on the associated anchor assembly according to the prior art, a particularly high

Schaltdynamik be realized even when pulling the plunger into the housing, without the risk that the plunger - due to inertia - of the

Anchor arrangement separates. And just as little can an increased friction or other adhesive force of the protruding from the housing end of the plunger on the component to be switched cause that when retracting the

Anchor arrangement of the ram separates from this. Thus, switching dynamics and reliability benefit

equally from this further education

Adjusting device according to the invention.

Particularly preferably, the form-fitting allows

However, high-tensile connection of the plunger with the associated armature arrangement, however, a rotatability of the plunger about the plunger axis. If the plunger can rotate freely around its axis in this sense during operation, this is favorable from a wear technology point of view and thus advantageous for life and reliability.

Another preferred development of the invention is characterized in that the armature arrangement has two end faces on both sides of the permanent magnet

arranged flux guides and a connector on which the tensile connection is made to the plunger has. The connector thus determines the distance that the plunger to the magnet group (permanent magnet and the two flux guides) complies. In terms of construction, it is particularly advantageous if a core (consisting of non-ferromagnetic material) passes through the two flux conducting pieces and the permanent magnet in the (for example, thermoset material

sprayed) connector extends into it. Also, it may be advantageous if the core on the connector

is formed, in particular by a one-piece, consisting for example of thermoset material

Connector core unit is molded onto the magnet group. In each case, the two flux conducting pieces and the permanent magnet are annular in shape with a central opening for the passage of the core.

It is particularly advantageous if the above

explained core the plunger opposite emerges from the relevant flux guide and with the protruding from the magnet group (s. O.) End slidably protrudes into a recorded in the coil assembly guide book. Thus, a reliable two-sided leadership of the anchor assembly (in the off

Thermoset material molded housing section and in said guide bush) realize. The above-explained advantages of the invention are particularly pronounced in this case. In addition, through the

two-sided leadership of the anchor assemblies the axial

Length of the actuator fail very short.

According to yet another preferred embodiment of the invention, the armature assembly has a

Against rotation. The angular position of

Anchor arrangement relative to the coil assembly is fixed in this case. One of the advantages of this

A further development is that the surfaces transmitting a tensile force between the armature arrangement and the tappet are made particularly large and kinematically

can be arranged particularly favorable. In particular is an introduction of a tensile force from the armature assembly in the plunger on two relative to the plunger axis opposite surface sections possible. This is favorable in view of a particularly low friction of the plunger in the housing and a particularly low wear on the plunger.

The above-described anti-rotation device preferably comprises at least one guide projection arranged peripherally on the armature arrangement, preferably relatively close to the tappet and / or on the connector. Particularly preferred are two such guide projections

provided, which are very particularly preferably arranged symmetrically to the plane defined by the plunger axis and the coil axis and each other ideally more or less diametrically opposed relative to the coil axis. These guide projections can not alone cause an anti-rotation, but possibly the only guide the armature assembly in the molded of thermoset material housing portion

represent. In this case, the contact between the armature arrangement and the housing section injection-molded from thermoset material is limited to the contact surfaces on the guide projections and to grooves correspondingly formed in the housing section. At this

Further development, for example, is the only slight risk of a negative influence on the operating behavior of the adjusting device due to thermally induced deformations of advantage.

The at least one guide projection is particularly preferably designed to be bead-shaped in such a way that its axial length is substantially greater as its width in the circumferential direction. This applies in any case in the absence of guidance of the armature arrangement at the opposite end (see above). If such a second guidance of the armature arrangement is realized, then the axial length of the at least one guide projection

be substantially reduced, so that, for example, two wart-shaped guide projections sufficient.

Another preferred embodiment of the invention is characterized in that exactly two

Electromagnetic linear actuators are provided, wherein between the two anchor assemblies a

Position sensor is placed. The position sensor is preferably designed as a magnetostrictive sensor, in particular as a Hall sensor. In this case, the permanent magnets of the two armature arrangements are particularly magnetized in an oppositely directed manner

(polarized). In this way, the magnetostrictive sensor between the armature assemblies of the two

Linear actuators differ, so that by means of a single magnetostrictive sensor, the switching position of both armature plunger units can be detected, d. H. In particular, it can be determined which of the two plungers assumes its extended position and which retracts its retracted position.

According to yet another preferred embodiment of the invention, each of the coil assemblies is surrounded by a cage made of ferromagnetic material. Preferably, the cages have axially slotted shell portions which, for example, two or more to each other in

Circumferentially spaced strips may comprise. Particularly preferably penetrate the Sheath sections each other between the associated

Coil assemblies. For example, this can mutually a strip of the shell portion of

Cage of a linear actuator in an existing between two strips of the skirt portion of the cage of the other linear actuator gap.

The cages preferably have end caps.

If the jacket section of the respective cage, as explained above, consists of a plurality of strips, these are particularly preferably connected in one piece with the cover. In analogy to the shell sections penetrate

the lids of the cages of the two linear actuators are particularly preferred. For this purpose, the lid

Have recesses, wherein alternately engages the cover of the cage of a linear actuator in a recess of the lid of the cage of the other linear actuator. There is preferably a contact between the two covers, by contacting the two recesses

bordering edges abut each other.

Each cage preferably comprises a floor, wherein the two floors are particularly preferably part of a common one-piece floor element. The bottom element has two openings for the two anchor arrangements,

especially their connectors. In a particularly preferred development of the invention, the magnetostrictive sensor explained above can be placed on the bottom element between the two openings.

In yet another development is preferred in each cage a frontally, axially projecting into the coil assembly, the cavity frontally limiting Insert (made of ferromagnetic material) added. In the case of the leadership of the anchor assembly at its end opposite the plunger (see above), the use

at the same time assume the function of a guide bushing for a core of the armature arrangement (see above).

Hereinafter, the present invention will be more apparent from three illustrated in the drawings

Embodiments explained in more detail. It shows

Fig. 1 in a perspective view obliquely from above one

Section through an inventive

Adjusting device according to a first preferred

Embodiment,

Fig. 2 in a perspective view obliquely from below the

Adjusting device according to Fig. 1 with partially removed housing,

Fig. 3 in an individual representation of the two

Anchor arrangements of the adjusting device according to

FIGS. 1 and 2,

4 shows an intermediate used in the production of the adjusting device according to FIGS. 1 to 3 in a preliminary stage,

Fig. 5 shows the intermediate product of Fig. 4 in his

final stage,

Fig. 6 is a view corresponding to FIG. 1 a

second, modified embodiment, Fig. 7 is a view corresponding to FIG. 1 a

third, again modified

Embodiment and

Fig. 8, the anchor assembly of the third

Embodiment in perspective view from below. The illustrated in Figures 1 to 5

Actuator - for their function on the DE

102017103090 AI, the entire disclosure of which is incorporated by reference into the content of the present application, is referenced - comprises two housed in a common housing 1 electromagnetic

Linear actuators 2. Each of the linear actuators 2 comprises in turn a housing-fixed coil arrangement 3 extending around a coil axis X, an armature arrangement 4 movable along the coil axis X relative to the coil arrangement 3, and an armature arrangement 4 actuated by the armature arrangement 4 and parallel to the coil axis X movable plunger 5. The armature assembly 4 is at least partially in one within the

Coil arrangement 3 arranged cavity 6 was added. It comprises an annular, axially magnetized permanent magnet 7, two annular flux guides 8 arranged on the end faces on the end faces thereof

ferromagnetic material, a (not from

ferromagnetic, metallic or non-metallic material) connector 9 and a core 10, by means of which the four aforementioned parts are connected to a solid unit. The core 10

For this purpose, it extends through the central bores of the two flux conducting pieces 8 and of the permanent magnet 7 into a blind bore 11 of the connector 9.

The housing 1 is designed in three parts. It comprises a base plate 12, an upper housing section 13 placed thereon and a lower housing section 14 placed opposite the upper housing section 13 on the base plate 12. The latter is centered by a recess 15 in the base plate 12 and secured. By means of two sealing rings 18, 19 received in corresponding annular grooves 16, 17, the upper and lower housing sections 13 and 14 are sealed off from the base plate 12. The lower housing section 14, preferably made of metal, has two guide bores 20, in which the two - also preferably made of metal - plunger 5 slidably guided along their respective axis Y slidably. To the two guide holes 20

aligned openings 21 are provided in the base plate 12. In the case of both linear actuators 2, there is an offset a between the coil axis X and the plunger axis Y, which is parallel thereto, in such a way that the two plungers 5 have a minimum distance from one another. In the embodiment shown, the offset a

between the plunger axis Y and the coil axis X each slightly larger than the maximum radial extent of the permanent magnet 7 with respect to the coil axis X.

To actuate the plunger 5 by the respectively associated armature assembly 4 in both directions of the plunger 5 and the associated armature assembly 4 engage in the form of a positive fit in the region of a tensile connection 22. This connection 22 is designed so that a

Rotatability of the plunger 5 about the plunger axis Y is possible. For this purpose, the plunger head 23 has an annular groove 24 extending along the entire circumference of the plunger 5. And the associated connector 9 has at its the magnetic group (permanent magnet 7 and the two

Fluxes 8) facing away from an end portion

eccentric laterally projecting lug 25 on. In this, a sideways opening groove 26 with a T-shaped cross-section is made, wherein the groove Cross-section of the geometry of the plunger head 23rd

is adapted and corresponds to this. Thus engages a U-shaped retaining claw 27 of the connector 9 over an angular range of more than 180 ° form-fitting manner in the annular groove 24 of the plunger 5, which allows the transmission of high tensile forces. Compressive forces can be transmitted from the connector 9 of the armature assembly 4 to the plunger 5 both from the end face 28 of the groove 26 on the end face 29 of the plunger head 23 and from the end face 30 of the projection 25 on the adjacent side wall of the annular groove 24 of the plunger 5.

Each of the two each on a bobbin 31

wound, multi-membered coil assemblies 3 is surrounded by a cage 32 made of ferromagnetic material. Each of the two cages 32 comprises a front cover 33, a skirt portion 34 and a bottom 35. In each cage 32 is the end face, adjacent to the cover 33 and fixed thereto, an axially in the

Coil assembly 3 in projecting, the armature assembly 4 receiving cavity 6 frontally limiting

Insert 36 recorded. The shell portion 34 of each cage 32 consists of two strip-like, integrally connected to the respective cover 33, opposite this angled and brought into a concave shape shell parts 37. The two floors 35 are part of a common for both linear actuators 2

Floor element 38. On this is centrally, between the two anchor assemblies 4, a Hall sensor 39 was added.

As illustrated in FIGS. 4 and 5, as part of the production of the adjusting device according to FIGS. 1 to 3, a connection conductor group 40 becomes a Base structure 41 molded with a molded-on mating counterpart 42. The Hall sensor 39, for its inclusion in the base structure 41 a corresponding

Recess 43 is provided, is connected to the appropriate contacts 44 of the connecting conductor group 40. Then, the two coil assemblies 3 together with the associated parts of the cages 32 (each cover 33 and shell portion 34) on top of the base structure 41st

placed. For centering and securing the position of the

Coil assemblies 3 engage four frontally on the

Spool carriers 31 provided centering projections in corresponding, provided in the base structure 41 receptacles 45 a. The windings of the two

Coil assemblies 3 are assigned to the

Terminal Conductor Group 40 contact lugs 46

connected.

As shown in FIG. 5, in the center region of the adjusting device, the two parts of the cages 32 placed on top of the base structure 41 penetrate one another. For this purpose, the cover 33 of the cages 32nd

Recesses 47, wherein in each case a lid 33 engages with a recess 47 of its adjacent corner 48 in the recess 47 of the other lid 33. There is a direct contact between the two covers 33 by the said corners 48 abut each other.

Comparable to penetrate the two

Sheath sections 34 each other by mutually engaging a strip 37 of the shell portion 34 of a cage 32 at the edge in an existing between the two two strips 37 of the shell portion 34 of the other cage 32 gap 49. Also between the shell portions 34 of the two cages 32 is a direct contact, by the respective strips 37 edge side

abut each other. And at the bottom of the

Base structure 41 is - inserted into a corresponding recess 50 - the cage bottom member 38.

The intermediate product described above is then placed in a Spitzgießwerkzeug, in which - of thermoset material - the upper housing portion 13 is molded onto the intermediate product. The two

Coil assemblies 3 with the parts of the cages 32 folded over are embedded completely and laterally in the thermoset material. In the upper one

Housing section 13 are also - by

Use of two corresponding, also in the

Spool support 31 in projecting cores of the injection mold - two openings 51 for the two armature assemblies 4 executed. With regard to the lateral projections 25 of the connectors 9 (see above) and the plunger 5 connected thereto, the two apertures 51 merge into one another over a substantial part of their axial extent, so that only one web 52 of comparatively small height remains between them , to

Sliding-sliding guide of the armature assemblies 4 in the upper housing portion 13 (including a rotation of the armature assemblies) are in the upper housing portion 13 in the region of the two openings 51 guide portions 53 each having two axially parallel to the coil axis X extending guide grooves 54th

executed. In this grip two laterally on the

respective connector 9 provided, bead-like

executed guide projections 55 such that the guide projections 55 of the connectors 9 on thermoset material of the upper housing portion 13th existing, the guide grooves 54 limiting

Support support surfaces 56.

The second preferred one shown in FIG

Embodiment differs from that of Figures 1 to 5 essentially only in that here the core 10 of the armature assembly 4 the plunger 5 protrudes from the magnet group opposite, d. H. through the plunger 5 facing away from the flux guide 8 and out of this. The corresponding projection 57 of the core 10 is slidably guided in a corresponding bore 58 of the insert 36. This has in addition to the

Function of a guide bush 59.

The third preferred embodiment illustrated in Figures 7 and 8 differs from that of Figures 1 to 5 essentially by two significant modifications. On the one hand, here the connector 9 and the core 10 of the armature assemblies 4 each form a one-piece component. For this purpose, a connector core unit 60 consisting of thermoset material is molded onto the magnet group. In the interest of a particularly high strength, the openings of the two flux guides 8 are stepped undercut

designed .

And further, the front side of the extend

Connectors 9 of the armature assemblies 4 executed grooves 26 each consistently over the entire connector end face. This allows for that with the first

Housing section 13 (including the embedded therein

Coil arrangements 3) and only one type of Anchor assemblies 4 - depending on the specific application - different second housing sections 14 (and

Base plates 12) are combined, which differ by different distances of the plunger axes Y to each other. Thus, the connectors 9 to a certain extent form "universal connectors", whereby the need for different, specific to the respective offset a of the coil axis X and plunger axis Y to each other

adapted anchor assemblies 4 can be avoided.

Claims

claims

1. adjusting device with a housing (1) and

at least two electromagnetic linear actuators (2), each one

- a housing-fixed, around a coil axis (X)

around extending coil assembly (3),

- one at least partially in one within the

Coil arrangement (3) arranged cavity (6), along the coil axis (X) relative to the coil assembly (3) movable, an axially magnetized permanent magnet (7) having armature assembly (4) and

- one of the armature assembly (4) actuated, in the housing (1) along a plunger axis (Y) slidably guided ram (5)

in which at least one of the linear actuators (2) has an offset (a) between the coil axis (X) and the ram axis (Y),

characterized,

that the housing (1) by a molding of the

Coil assemblies (3) formed with a thermoset material housing portion (13), which axially to the coil assemblies (3) offset guide portions (53) for the armature assemblies (4) with existing thermoset material support surfaces (56), where the each associated armature assembly (4) slidably abuts.

2. Adjusting device according to claim 1, characterized

characterized in that the plunger (5) and the associated armature arrangement (4) in the region of a tension-resistant connection (22) engage in a form-fitting manner.

3. adjusting device according to claim 2, characterized

characterized in that the positive tensile strength

Connection (22) of the plunger (5) with the associated armature assembly (4) allows rotation of the plunger (5) about the plunger axis (Y).

4. Adjusting device according to claim 2 or claim 3, characterized in that the armature arrangement (4) has two end faces on the permanent magnet (7) arranged Flussleitstücke (8) and a connector (9) on which the tensile connection (22) to the plunger ( 5) is executed has.

5. Adjusting device according to claim 4, characterized

in that the tension-resistant connection (22) comprises a groove (26) extending continuously over the entire end face of the relevant connector (9).

6. Adjusting device according to claim 4 or claim 5, characterized in that a core (10) through the two flux guides (8) and the permanent magnet (7) extends into the connector (9) inside.

7. Adjusting device according to claim 6, characterized

characterized in that the core (10) the plunger (5) opposite from the flux guide (8) emerges and slidably protrudes into a guide bush (59) accommodated in the coil arrangement (3).

8. Adjusting device according to claim 6 or claim 7, characterized in that the core (10) and the

Connector (9) form a one-piece component.

9. Adjusting device according to one of claims 1 to 8, characterized in that the armature assembly (4) has a rotation.

10. Adjusting device according to claim 9, characterized

characterized in that the anti-rotation device comprises at least one guide projection (55) arranged peripherally on the respective armature arrangement (4).

11. Adjusting device according to claim 10, characterized

characterized in that the at least one

Guide projection (55) is designed to extend axially beaded such that its axial length is substantially greater than its width in

Circumferential direction.

12. Adjusting device according to claim 10 or claim 11, characterized in that the armature assembly (4) has two guide projections (55), which are preferably arranged symmetrically to the plane defined by the plunger axis (Y) and the coil axis (X).

13. Adjusting device according to claim 1 to claim 12, characterized in that in each case the permanent magnet (7) of the associated coil assembly (3) is radially surrounded.

14. Adjusting device according to one of claims 1 to 13, characterized in that exactly two

electromagnetic linear actuators (2) are provided, wherein between the two anchor assemblies (4) a

Position sensor is placed.

15. Adjusting device according to claim 14, characterized

characterized in that the position sensor as

Magnetostrictive sensor, in particular as a Hall sensor (39) is executed.

16. Adjusting device according to one of claims 1 to 15, characterized in that the permanent magnets (7) of the two armature assemblies (4) are mutually magnetized oppositely directed.

17. Adjusting device according to one of claims 1 to 16, characterized in that each of the coil assemblies (3) by a cage (32) is surrounded by ferromagnetic material.

18. Adjusting device according to claim 17, characterized

characterized in that in each cage (32) has a front side, axially in the coil assembly (3) projecting into the cavity (6) frontally limiting insert (36) is received.

19. Adjusting device according to claim 17 or claim 18, characterized in that the cages (32) have axially slotted shell sections (34) and each other between the associated coil arrangements (3).

penetrate.

20. Adjusting device according to one of claims 17 to 19, characterized in that the cages (32) end caps (33), which each other between the associated coil assemblies (3) in the range of

Penetrate recesses (47).

21. Adjusting device according to claim 20, characterized

in that each cage (32) has two integral parts with the relevant lid (33)

having strip-shaped shell parts (37).

22. Adjusting device according to one of claims 17 to 21, characterized in that the cages (32) a

have common bottom element (38).