WO2014086345A1 - Sliding cam system and sliding cam actuator comprising a moving pin connected to a permanent magnet unit - Google Patents

Abstract

The invention relates to a sliding cam actuator (1) for a sliding cam system, comprising at least one coil former (2) having a winding, through which electrical current can flow so as to generate a magnetic force, having at least one magnetic core (3) adjacent to the coil former (2), in which magnetic core at least one guide pin (5) is mounted in linearly movable fashion, and having at least two moving pins (11), which are provided for engaging in in each case one groove in a sliding cam, and also comprising a permanent magnet unit (7), which has at least one permanent magnet (8) and at least one ferromagnetic disc (9), wherein at least one of the moving pins (11) is connected cohesively and/or in a form‑fitting manner to the permanent magnet unit (7) or is an integral part of the permanent magnet unit (7).

Description

 Name of the invention

Slide cam system and

 Sliding cam actuator with attached to a permanent magnet unit

 Laufpin

description

Field of the invention

The invention relates to a sliding cam actuator for a sliding cam system, comprising at least one spool body with a winding which can be flowed through by electric current for generating a magnetic force, with at least one adjacent to the bobbin magnetic core in which at least one guide pin is mounted linearly displaceable and with at least two Laufpins , which are provided for engagement in a respective groove of a sliding cam, and with a permanent magnet unit having at least one permanent magnet and at least one ferromagnetic disc. To operate two run pins, two permanent magnet units and two guide pins are often used.

DE 10 2007 028 600 A1 discloses an electromagnetic actuating device with a plurality of electromagnetic actuator units that are selectively adjustable for exerting a setting force on a corresponding plurality of elongate, axially parallel plunger units. The actuator units are provided parallel to one another along their direction of adjustment in a common housing and each form an engaging end facing the tappet units of an at least sectionally planar, axially movable in the direction of adjustment engagement surface. An engagement-side end face cooperates with a respective one of the plunger units with the engagement surface. It sits at least one of the plurality of plunger units with their engagement-side end face eccentrically and / or with only a partial surface on the engagement surface of the associated actuator unit, in particular adheres to it magnetically. The Laufpin, which is often arranged eccentrically to the permanent magnet unit, so in other words, magnetically adheres to this permanent magnet unit. The principle already known in this regard should be considered integrated here. There are usually no other connections between the permanent magnet unit and the barrel pin, so as not to adversely affect the functionality.

However, DE 10 2006 034 922 takes a completely different approach in the case of a single-pin actuator and discloses an electromagnetic positioning device and a method for the production thereof. In this case, a coil device, essentially consisting of a single core of a magnetic material, which is enclosed by a coil disclosed, and having a relative to the coil means movably arranged adjusting element with an end wear-trained engaging portion, wherein the actuating element via a Bestro- tion of the coil means can be acted upon by an actuating force. In this case, permanent magnet means are arranged on the actuating element via which the actuating element is held magnetically in the currentless state of the coil device to the coil means. DE 10 2006 034 922 A1 proposes that a safe and low-wear control operation is made possible, and yet structurally simple and cost-effective, if decoupling means are provided, via which the actuating element is magnetically decoupled from the permanent magnet means at least in the engagement region.

However, in known solutions, for example from DE 10 2006 034 922 A1, under certain circumstances a loss of contact of the permanent magnet unit to the rotor pin may occur in the case of external excitations, so that the rotor pin extends out of the housing of the sliding cam actuator.

Even during operation in the motor vehicle, in which such a sliding cam actuator is used within an internal combustion engine, a solubility Ches losing the runner in the sense of unwanted extension conceivable, especially in the presence of an external excitation, such as a mechanical shock. The Laufpin then loses its contact with the permanent magnet unit and moves unintentionally. This may possibly only lead to an unwanted adjustment of the sliding cam unit. However, capital engine damage can also be the result if, at the same time, the second running pin has also been extended, be it intentionally or unintentionally.

It is the object of the present invention to overcome the disadvantages of the prior art and to provide an optimization of the connection between the running pin and the permanent magnet unit of an actuator for sliding cam systems.

Disclosure of the invention

This object is achieved in that at least one of the running pins is material and / or positively connected to the permanent magnet unit or an integral part of the permanent magnet unit. Under a Laufpin is understood in particular a pin-like actuator. Just such a sliding cam system is improved, in which an actuator is used, in which an eccentrically to the permanent magnet unit and / or to the bobbin arranged Laufpin magnetically on the permanent magnet unit, comprising at least one permanent magnet between at least two ferromagnetic discs together with a guide pin adheres and no further positive and / or material connection exists.

Advantageous embodiments are claimed in the subclaims and are explained in more detail below.

Thus, it is advantageous if the running pin has a portion which is widened disk-shaped and flat against the permanent magnet or the Laufpin at least partially flat on a preferably ferromagnetic Disk of the permanent magnet unit is applied, further preferably with an axial surface is applied there. In this way, on the one hand, an integral solution can be achieved or, on the other hand, a complete positive locking solution or a partial positive locking solution can be realized.

An advantageous embodiment is also characterized in that a pin-like portion of the running pin is connected by at least one part of the permanent magnet unit, which protrudes through one or two ferromagnetic discs and / or the permanent magnet, and material and / or form-fitting to at least one of these components. A cost-effective connection option is then available.

For the production, it is advantageous if the pin-like portion has at its end close to the bobbin a thickening, such as in the manner of caulking / Spaltverstemmung and / or flanging, which counteracts removal of the running pin of the permanent magnet unit.

When the peg-like portion projects through a through-hole extending through at least one of the two ferromagnetic disks and / or the disk-like permanent magnet, and is preferably axially and / or radially-playfully, to allow rotation of the runner pin in the groove of the shift cam in the state used there, this has positive effects on the functionality. It should be noted that the through hole in the radial direction can also be configured open on one side, for example in the manner of a groove or groove.

The assembly can be simplified if the guide pin and / or the spinning pin facing disc and / or the running pin is made in one piece. A two or three of these components combining Monolithteil can be prefabricated inexpensively and then use interchangeable in the sliding cam actuator. The installation of prefabricated modules in an embodiment of different sliding cam actuators for different applications, is advantageous. This is facilitated if a form-fittingly connected to the permanent magnet unit additional component, such as a cap, such as a sleeve, such as a sleeve or as a Kopplung Spritzbaueil, such as a plastic injection molded part, positively and / or non-positively and / or cohesively with at least one component the permanent magnet unit is connected.

For the reduction of corrosion, it is also advantageous if the plastic injection-molded part surrounds the entire permanent magnet unit and / or forms the guide pin. Also, the entire concept can be made more compact.

If the sleeve is pressed on the pin-like portion of the guide pin and / or crimped with this, so a simple captive can be achieved.

It is also advantageous for the function if the guide pin has a spacer section for bringing into contact with the sliding cam made of preferably wear-resistant material, such as hardened 100 Cr 6, for example, and a proximal section of the coil former preferably made of plastic, light metal or nonmagnetic Metal, such as non-magnetic steel has. Different embodiments are explained in more detail in a drawing and are described in detail below.

1 shows a first embodiment according to the invention of a sliding cam actuator partially shown in longitudinal section with a "full positive connection" of the running pin to the permanent magnet unit, 2 is an enlargement of the connection region II of FIG. 1,

3 shows an alternative embodiment of the running pin in a representation comparable to FIG. 2,

4 shows a further embodiment of a sliding cam actuator according to the invention with a "partial positive engagement connection" of the running pin to a component of the permanent magnet unit, namely to the ferromagnetic disk closest to the running pin,

5 is an enlarged view of the connection region V of FIG. 4,

6 shows a further embodiment according to the invention of a sliding-type actuator with an "integral solution", in which the running pin is an integral one

Part of the permanent magnet unit is, in particular a part of the ferromagnetic disk,

7 shows a further embodiment according to the invention of a sliding-type actuator in a manner of representation comparable to that of FIGS. 1, 4 and 6, wherein a "spraying solution" is selected, that is to say the running pin is molded onto the permanent-magnet unit,

8 is an enlarged view of the connection region VIII of FIG. 7,

9 shows a representation comparable to FIG. 1 of a further embodiment according to the invention, wherein an additional component, such as a cap, a sleeve, or a sleeve is inserted, and FIG. 10 shows an enlarged view of the region X from FIG. 9 with a higher one

Detailierungsgrad the positive connection between the coil body closer ferromagnetic disc and the sleeve-like additional component. The figures are merely schematic in nature and are only for the understanding of the invention. The same elements are provided with the same reference numerals.

In Fig. 1, a first embodiment of a sliding cam actuator 1 according to the invention is shown. The sliding cam actuator 1 is for a sliding cam system used on an internal combustion engine such as an Ottooder diesel engine. The sliding cam actuator 1 has a coil body 2, which has a winding, which can be flowed through with electric current. Then, a magnetic force is generated. The magnetic core 3 is surrounded by the winding of a bobbin 2. The winding itself can also be referred to as coil 4 and is part of the bobbin 2.

In the present embodiment, two bobbin 2, two coils 4 and two magnetic cores 3 are provided, wherein in each of the two magnetic cores 3, a guide pin 5 is present, which is axially displaceably mounted in each case in a hole formed as a guide hole 6.

Each permanent magnet unit 7 comprises a permanent magnet 8 and two ferromagnetic disks 9 surrounding it on both sides. The permanent magnet unit 7 has a through hole 10, wherein a through pin 10 is inserted in the through hole 10, more precisely an actuator pin / displacement cam pin , The running pin 11 may be made of metal, preferably a steel alloy. It may be formed in one piece or composed of several individual sections, wherein the individual sections can be positively, materially and / or non-positively connected to each other.

The barrel pin 1 is provided for penetrating into a groove of a sliding cam, which is not shown. Like the guide pin 5, it is linear. slidably disposed and engages through a barrel pin housing 13 to the outside. The barrel pin housing 13 together with an active part housing 14 forms the housing of the sliding cam actuator. The running pin 11 is materially and / or positively connected to the permanent magnet unit 7 or even an integral part of this permanent magnet unit 7. In the embodiment shown in Fig. 1, the running pin 11 is made of non-magnetic material and positively connected to the permanent magnet unit 7. Here, in the permanent magnet 8 and in the two ferromagnetic disks 9, an eccentric bore, which forms the through hole 10. Through this hole, the pin-shaped portion 12 of the barrel pin 11, which is also referred to as a pin, is pushed through and crimped on the side near the bobbin and / or caulked. To compensate for coaxialities between the barrel pin 11 and the guide pin 5, the holes in the permanent magnet 8 and in the ferromagnetic discs 9 are made larger than the pin on the Laufpin 1 1. It is also conceivable, the balance between the guide pin 5 and the corresponding To provide guide bore and / or between the running pin 1 1 and the corresponding guide bore.

Furthermore, the caulking, possibly as Spaltverstemmung, or the crimping of the pin on the barrel pin 11 is preferably carried out so that the Laufpin 11 can still rotate to a roll in the groove (not shown) of the sliding cam, which can also be referred to as a sliding groove to ensure when moving the sliding cam piece. Furthermore, the projecting Laufpin-end can be used as a stop between the magnetic core 3 and the Parmanentmagneteinheit 8 in the base position of the Laufpins 11.

Instead of the bore, it is also conceivable as a variant to introduce a radial groove in the permanent magnet 8 and / or the discs 9. In Fig. 2, the caulking / flanging 15 is clearly visible. With reference to Fig. 3 it should be noted that it is possible to improve the wear resistance of the running pins 11, this run pin 11 in two parts. The upper part, which is connected to the permanent magnet unit 7, may be made of a non-magnetic material and the lower part, which is guided in the Laufpin housing 13 and immersed in the sliding groove, not shown, from a wear-resistant material, such as 100 Cr 6. The connection of these two parts, that is, the upper part and the lower part can be cohesively, for example by welding, gluing or soldering and / or positive, for example by pressing the pin into the bore done.

FIGS. 4 and 5 show an implementation modified from the embodiment shown in FIGS. 1 and 2. Here, only the spinning pin 1 facing disc 9 has an eccentric bore. The Laufpin 11 projects with a pin, so its peg-shaped portion 12 through this disc 9 and is crimped or caulked with this.

The aspects of the invention explained below can be applied to this embodiment, just as the individual aspects can also be permuted with one another.

Particularly in Fig. 5, the caulking / crimping 15 of the running pins 11, between the runpin 1 nearest ferromagnetic disc 9 and the permanent magnet 8 can be well recognized. The ferromagnetic disk 9 does not necessarily consist of ferromagnetic material, which also applies to the other embodiments.

FIG. 6 shows a further variant of the solution according to the invention. In this embodiment, an eccentrically arranged disc is formed on a permanent pin 8 facing the Laufpin end, which forms the lower disc of the permanent magnet unit 7. Possible eccentricities between the guide pin 5 and the barrel pin 11 are compensated in this variant, preferably by means of play between the guide bore 6 (for the guide pin 5) and the guide pin 5. However, it is in principle also possible to provide a corresponding clearance between the barrel pin 1 1 and the associated guide bore.

A rolling of the barrel 11 on the flank of the sliding groove during the displacement of the sliding pin is not possible in this embodiment, so that the barrel pin 11 must slide over the edge. As an alternative to the molded-on disk, it is also conceivable for a disk to be connected in a material-locking manner, for example by means of welding, soldering or gluing, to the running pin 11.

Also in this solution, the barrel pin 1 can be made in two parts of non-magnetic and wear-resistant material.

In a solution in which the barrel pin 11 and the disc are cohesively connected to each other, it is conceivable to produce the disc of ferromagnetic material, the upper Laufpin area of amagnetic material and the lower Laufpin area of wear-resistant material. Thus, in this integral solution, three materials are combined in one and the same combination component.

As an additional embodiment, it is conceivable that the running pin 11, the spinning pin facing disc and the guide pin 5 are made in one piece.

In the embodiment shown in FIGS. 7 and 8, the permanent magnet 8, the ferromagnetic discs 9 and the barrel pin 1 are molded into a unit, wherein the guide pin 5 is formed simultaneously with the encapsulation. Thus, an additional component 16 is used which is designed as a coupling injection component in the manner of a plastic injection-molded part.

The additional component may consist of thermoplastic or thermosetting plastic. Furthermore, it is conceivable that the guide pin 5 is not made of plastic, but is designed as a metal pin and with the remaining components, so the permanent magnet 8, the discs 9 and the barrel pin 11 is molded into a unit.

Possible eccentricities are also compensated in the embodiment preferably by means of play between the guide bore 6 (for the guide pin 5) and the outer diameter of the guide pin 5.

A rolling of the barrel 11 on the flank of the sliding groove during the displacement of the sliding piece is not possible in this embodiment, so that the barrel pin 11 must slide over the edge. In the embodiment shown in FIGS. 9 and 10, the additional component 16 is designed as a cap or sleeve. In this embodiment shown, the running pin 11 and the permanent magnet unit 7 are connected by means of the cap, which is pressed from the side remote from the running pin on the running pin 11 and / or crimped thereto.

As before, in this embodiment, the running pin 11 can be made in two parts.

A rolling of the barrel 11 on the flank of the sliding groove during the displacement of the sliding piece in this embodiment would not be possible.

Such a sliding cam actuator 1 can be used in sliding cam systems (CSS) with eccentrically arranged to permanent magnet unit 7 Laufpin 1 1. In principle, the invention can also be used for and in centrically arranged (n) Laufpins. LIST OF REFERENCE NUMBERS

1 sliding cam actuator

 2 bobbins

 3 magnetic core

 4 coil

 5 guide pin

 6 pilot hole

 7 permanent magnet unit

 8 permanent magnet

 9 ferromagnetic disk

 10 through hole

 11 race pin

 12 peg-shaped section

 13 barrel pin housing

 14 active housing

 15 caulking / flanging

 16 additional component

Claims

claims 1 . Sliding cam actuator (1) for a sliding cam system, comprising at least one bobbin (2) with a winding that can be flowed through by electric current to generate a magnetic force, with at least one magnet core (3) adjacent to the bobbin (2), in which at least one guide pin ( 5) is mounted linearly displaceable and with at least two running pins (1 1), which are provided for engaging in a respective groove of a sliding corner, as well as with a permanent magnet unit (7), the at least one permanent magnet (8) and at least one ferent Having a magnetic disc (9), characterized in that at least one of the running pins (1 1) material and / or form-fitting manner with the permanent magnet unit (7) is connected or an integral part of the permanent magnet unit (7). 2. sliding cam actuator (1) according to claim 1, characterized in that the running pin (1 1) has a portion which is widened disc-shaped and flat against the permanent magnet (8) or the Laufpin (1 1) at least partially flat on a disc (9) the Permanent magnet unit (7) is applied. 3. sliding cam actuator (1) according to any one of claims 1 or 2, characterized in that a pin-like portion (12) of the Laufpins (1 1) by at least a portion of the permanent magnet unit (7), such as one or two, for example ferromagnetic discs (9). and / or the permanent magnet (8) protrudes, and material and / or positively connected to at least one of these components. 4. sliding cam actuator (1) according to claim 3, characterized in that the pin-like portion (12) at its bobbin near the end of a thickening, such as a kind of Spaltverstemmung and / or flanging (15), which counteracts removal of the running pin (1) from the permanent magnet unit (7). A sliding cam actuator (1) according to claim 3 or 4, characterized in that the pin-like portion (12) extends through a through-hole (10) extending through at least one of the two ferromagnetic discs (9) and / or the disc-like permanent magnet (8), passes through and is subject to play in order to support a rotation of the spinning pin (1 1) inserted in the groove of the sliding cam state. Slide cam actuator (1) according to any one of claims 1 to 5, characterized in that the guide pin (5) and / or the the Laufpin (11) facing disc and / or the Laufpin (11) are made in one piece. Slide cam actuator (1) according to one of claims 1 to 6, characterized in that a form-fitting with the permanent magnet unit (7) connected to additional component (16), such as a cap, such as a sleeve, such as a sleeve or as a coupling injection component, approximately in the manner of Plastic injection molded part, positive and / or force and / or materially connected to the barrel pin (1) is connected. Slide cam actuator (1) according to claim 7, characterized in that the plastic injection-molded part surrounds the entire permanent magnet unit (7) and / or forms the guide pin (5). Push cam actuator (1) according to claim 7, characterized in that the sleeve is pressed onto the pin-like portion (12) of the running pin (1) and / or is crimped with this. 10. sliding cam actuator (1) according to one of claims 1 to 9, characterized in that the guide pin (5) has a distal portion for in contact with the sliding cam made of wear-resistant material and has a bobbin (2) proximal proximal portion of plastic, light metal and / or non-magnetic metal.