Electromagnetic actuating apparatus and system for adjusting a functionality of a motor vehicle assembly

Abstract

An electromagnetic actuating apparatus with two armature means which are designed to exert an actuating force on two tappet units which are extended in the longitudinal direction along a longitudinal movement axis and are guided such that they can be moved in a parallel manner in a common guide section of a housing which accommodates the armature means, wherein the tappet units each have an engagement end which is designed to interact with an actuating groove in a motor vehicle motor adjustment system and projects from the guide section at least in an engaged state, and the common guide section forms a guide end surface in which guide openings associated with the two tappet units, are open, wherein a connecting path which runs through center axes of the only two guide openings in the guide end surface forms an offset (v) from a surface center point of the guide end surface and/or from a surface center point of a housing end surface of the housing, wherein the surface center point lies on a perpendicular bisector of the connecting path.

Claims

1. An electromagnetic actuating apparatus with two armature means (24, 26, 18, 20) which are designed to exert an actuating force on two tappet units (34, 36) which are extended in the longitudinal direction along a longitudinal movement axis and are guided such that they can be moved in a parallel manner in a common guide section (32) of a housing which accommodates the armature means, wherein the tappet units each have an engagement end (38, 40) which is designed to interact with an actuating groove in a motor vehicle motor adjustment system and projects from the guide section at least in an engaged state, and the common guide section forms a guide end surface (62) in which guide openings associated with the two tappet units, are open, wherein a connecting path (2b) which runs through centre axes of the only two guide openings in the guide end surface forms an offset (v) from a surface centre point (66) of the guide end surface and/or from a surface centre point (66) of a housing end surface of the housing, wherein the surface centre point lies on a perpendicular bisector (80) of the connecting path (2b).

2. The apparatus according to claim 1, wherein the perpendicular bisector of the connecting path forms a symmetry axis for the guide end surface and/or the housing end surface.

3. The apparatus according to claim 1, wherein the guide end surface forms a circular, oval, rectangular or polygonal circumferential contour or in circumference describes hybrid forms thereof.

4. The apparatus according to claim 1, wherein the offset is arranged so that the relationship:
offset v=b.Math.tan applies, wherein b corresponds to half the measurement of the connecting path and corresponds to an angle between 5 and 40.

5. The apparatus according to claim 4, wherein corresponds to an angle between 10 and 30.

6. The apparatus according to claim 1, wherein the offset is arranged so that the relationship:
offset v=a.Math.sin applies, wherein a corresponds to the distance of a centre axis of one of the guide openings in the guide- and/or housing end surface from a respective surface centre point (66) and corresponds to an angle between 5 and 40.

7. The apparatus according to claim 6, wherein corresponds to an angle between 10 and 30.

8. The apparatus according to claim 1, wherein the guide section (32) is connected on or in an armature housing (10) which is widened in at least a transverse direction with respect to the guide end surface.

9. The apparatus according to claim 8, wherein the guide section (32) is connected on or in the armature housing in a torque-proof manner.

10. The apparatus according to claim 1, wherein at least one of the tappet units (34, 36) in the region of the engagement end (38, 40) is realized from a material having an increased wear resistance.

11. The apparatus according to claim 1, wherein the armature means provide a carrier section (24, 26) constructed for the detachable sitting of an associated one of the tappet units with an end lying opposite the engagement end.

12. The apparatus according to claim 1, wherein at least one of the tappet units is guided rotatably in the guide section (32) and/or the tappet units (34, 36) are guided parallel to one another.

13. A system for adjusting a functionality of a motor vehicle assembly providing an adjustment groove (42), with an electromagnetic actuating apparatus with a plurality of armature means (24, 26, 18, 20) which are designed to exert an actuating force on a plurality of tappet units (34, 36) which are extended in the longitudinal direction along a longitudinal movement axis and are guided such that they can be moved adjacent to one another in a common guide section (32) of a housing which accommodates the armature means, wherein the tappet units each have an engagement end (38, 40) which is designed to interact with an actuating groove in a motor vehicle motor adjustment system and projects from the guide section at least in an engaged state, and the common guide section forms a guide end surface (62) in which guide openings, in particular guide bores, associated with the plurality of tappet units, are open, and wherein a connecting path (2b) which runs through centre axes of two guide openings in the guide end surface forms an offset (v) from a surface centre point (66) of the guide end surface and/or from a surface centre point (66) of a housing end surface of the housing, and with an axially displaceably mounted adjustment axis, having the adjustment groove (42), which is positioned for actuation by engagement with the engagement end (40) relative to the electromagnetic actuating apparatus so that the projection of the force vector (58) to the end surface of a force applied in an engagement state from the adjustment groove to the engagement end extends through the surface centre point of the housing end surface.

14. The system according to claim 13, wherein the guide openings are guide bores.

15. The system according to claim 13, wherein the electromagnetic actuating apparatus is aligned relative to the adjustment axis so that the adjustment axis (44) extends orthogonally to a centre axis (22) of the actuating apparatus extending through the surface centre point (66) of the housing end surface and parallel to the longitudinal movement axis and can be moved axially in the engagement state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages, features and details of the invention will emerge from the following description of preferred example embodiments and said drawings; these show in

(2) FIG. 1 a diagrammatic representation to illustrate the procedure according to the invention in the arranging of guide openings (guide bores) in the guide end surface, here in the case of a pair of tappet units guided parallel to one another;

(3) FIG. 2 a longitudinal sectional view through a double actuator device for camshaft adjustment by means of a pair of tappet units (as in-house unpublished prior art at the time of application);

(4) FIG. 3 a face-side view onto the central guide end surface, and the housing end surface surrounding the latter, of the example embodiment of FIG. 2 (wherein in this respect II-II indicates the section line for the longitudinal sectional view of FIG. 2);

(5) FIG. 4 a geometrical representation to illustrate the occurrence of a torque action on the housing connection in the example embodiment of FIG. 2 on application of force along the force vector 58;

(6) FIG. 5-8 diagrammatic individual representations to illustrate the lateral forces occurring on an engagement of an engagement end of a tappet unit into an actuating groove and

(7) FIG. 9 a detail representation from the face-side view of FIG. 1 (more precisely: of the upper right-hand quadrant) to illustrate details of the dimensioning according to the invention, in particular to illustrate the respective distances, angles and their relationships to one another.

DETAILED DESCRIPTION

(8) FIG. 1 shows diagrammatically and in an analogous manner to the illustration regarding the (self-selected) prior art according to FIG. 4, the realization of the invention in the practical example embodiment of the double actuator, as was described with structural details in FIGS. 2 and 3. In so far as not discussed differently below, the details for execution shown in the figures apply likewise, wherein in particular, taking into consideration the offset v, to be discussed in detail below, the form of realization of FIG. 1 or respectively FIG. 9, can be realized as an example embodiment of the invention with recourse to the structural elements of FIG. 2, 3.

(9) In practical terms, the illustration of FIG. 1 shows how engagement ends 38 or respectively 40 are displaced by an offset v along a symmetry axis 80 from the surface centre point 66, so that the lateral force vector 58, produced by the engaging into the groove 42 (in this respect analogous to FIGS. 5 to 8) now runs through this centre point 66, correspondingly through this force (in the absence of a lever arm) a torque is no longer brought to the housing 32.

(10) The detail enlargement of FIG. 9 illustrates how this offset v can be dimensioned: Between the axes 80 or respectively 60, standing orthogonally to one another, spanning the end surface 62, v describes as offset the extent by which a bore centre point 82 of the bore associated with the tappet unit 36 (or respectively with the associated engagement end 40), is distant, along the axis 80, from the axis 60. To complete a right-angled triangle, b describes the half of the distance between the pair of tappet units in the end surface (more precisely: the distance between the respective centre points), and the measurement a describes as hypotenuse the distance between the centre point 66 and the centre point 82.

(11) In the illustrated example embodiment, an angle of the force vector of =15 is provided through the groove course of the groove 42 in the critical region, so that in the realization or respectively dimensioning of the electromagnetic actuating apparatus, the offset v can be arranged in one of the following two ways:
v=asin (1)
v=btan ,(2)

(12) wherein the specialist in the art will select the dimensioning which corresponds to a respective specification or respectively is provided through geometrical installation conditions. Typically, interest exists for instance in an installation location on the motor vehicle engine, in order to keep as small as possible a distance between the adjacent tappets (and hence the measurement b).

(13) The present invention is not restricted to the example embodiment which is shown. Rather, any desired other configurations, also concerning the precise configuration of respectively associated armature units, their arrangement in the housing or suchlike can be configured and varied according to a respective case of application, with this applying for instance also to other configurations of the housingfor example the housing 32 can be embodied having several parts.

(14) Finally, the present invention is indeed particularly favourably suited for the usage context for the adjustment of an engine functionality of an internal combustion engine, however the invention is not limited to this purpose of use, but rather it is basically possible, and included by the invention, to also make other fields of application accessible to this optimized technology.