EP2299457A2 - Electromagnet - Google Patents

Abstract

A solenoid (10) comprises tube pipe (11) as guide for magnet armature (13) and magnet body (12). The magnet body is connected with tube pipe, where at least one mechanism (14) for fastening magnet body to tube pipe is provided and the mechanism has at least one electrically conducting element contacting, on one hand, tube pipe and, on other hand, magnet body for electric connection of tube pipe and magnet body.

Description

The invention relates to an electromagnet with a magnetic body, which is connected to a Tubusrohr, wherein means for fixing the magnetic body are provided on Tubusrohr and the means at least one on the one hand the Tubusrohr, on the other hand, the magnetic body contacting, electrically conductive element for electrical connection of Tubusrohr and magnetic body.

Electromagnets with a tube tube and a magnetic body arranged thereon are known. For the connection of the magnetic body and Tubusrohr the magnetic body is attached to the Tubusrohr, deferred or pressed and so more or less permanently connected to the Tubusrohr. The Tubusrohr serves as a guide of a magnet armature, which is movable by application of electrical current.

Electromagnets typically have a protective conductor which is mounted so that an electrical connection between the metallic components of the electromagnet and the soil is made. Particularly important here is that the protective conductor contacts all metallic components of the electromagnet. In conventional electromagnets which have a magnetic body plugged or pressed onto the tube tube, a separation of the connection between the tube tube and the magnetic body occurs during long-term use, which is often accompanied by vibrations. With this separation, the protective conductor is often interrupted so that there is no longer sufficient grounding of the electromagnet. In addition, due to the fact that the magnetic body dissolves from Tubusrohr, also a malfunction of the electromagnet occur, which is undesirable in continuous use and leads to downtime and repair costs and associated costs.

It is an object of the present invention to provide an electromagnet with a tube tube as a guide for a magnet armature and a magnetic body which is connected to the Tubusrohr having a reliable connection between tube tube and magnetic body.

According to the invention this object is achieved in that an electromagnet is provided which comprises a tube tube as a guide for a magnet armature and a magnetic body. When erfindungegemäßen electromagnet is, as already known from the prior art, the magnetic body connected to the Tubusrohr. To make a reliable connection between To provide the Tubusrohr and the magnetic body, the electromagnet according to the invention is characterized in that at least one means for fixing the magnetic body is provided on Tubusrohr. By this means, a permanent connection between Tubusrohr and magnetic body can be made. In order to ensure that a grounding of the electromagnet, due to a continuous electrical contact of the magnetic body and Tubusrohr is given and currents can be derived here, it is provided that the means comprises at least one electrically conductive element for electrically connecting Tubusrohr and magnetic body. The electrically conductive element contacted on the one hand, the Tubusrohr and on the other hand, the magnetic body. The electrically conductive element contacts metallic surfaces of the tube tube or of the magnet body, so that a current can flow unhindered here.

The electromagnet used according to the invention for attachment of magnetic body and tube tube or fixing the magnetic body on Tubusrohr can as nut, clamp, splint, bracket, connector, clip, clamping ring or in any other way, the safe and reliable and before Ensures all permanent connection between the magnetic body and Tubusrohr, carried out. If the agent is designed as a nut, then this is screwed after plugging or pushing or caulking of the magnetic body with the Tubusrohr on the Tubusrohr, which conveniently has a corresponding thread for this purpose. Alternatively, there is also the possibility that the magnetic body has an example applied or molded thread, which is brought into engagement with a corresponding mating thread of the nut. In this case, there is also the possibility that a thread is attached to the nut, which thus projects beyond the nut and projects from a surface of the nut and in a recess in the magnetic body, for example, the tube tube encloses, is screwed. Of course, there is also the possibility that a total of two threads are provided, a radially arranged thread on Tubusrohr and an axially disposed thread in the magnetic body and the mother has corresponding counter-thread and thus connected to both the tube tube and with the magnetic body or can be screwed.

A simpler embodiment of the means for fastening represents the embodiment as a clamp, which is clamped or placed after assembling tube tube and magnetic body in one of the above-mentioned procedures on the tube tube or on the magnetic body. Again, corresponding projections, grooves or flanges may be provided on Tubusrohr and / or magnetic body with which the clip is brought into engagement. By means of the corresponding holding means for the clamp, a definition of the arrangement or attachment direction of the clamp or the position of the clamp can also be defined. A particularly simple connection between Tubusrohr and magnetic body can also be achieved by the use of a split pin. This split pin is inserted into a recess or opening provided either in the tube tube or in the magnetic body or in both components of the electromagnet and then fixed in the manner of a splint connection by bending or deforming the split pin. The means for attachment can also be designed as additional, cooperating with a splint castellated nut, in which case there is the possibility that either the mother or the splint or both are electrically conductive and ensure electrical connection of Tubusrohr and magnetic body.

In addition to the means already mentioned for attachment, the means may be formed as a bracket or as a set of brackets, which are pivotally mounted, for example, on Tubusrohr and engage in a projection or a correspondingly fitting recording on the magnetic body. In the opposite case, of course, there is also the possibility that the bracket are pivotally mounted on the magnetic body and engage in retaining means on Tubusrohr. It can of course also the bracket are formed so that it overlaps both the magnetic body and the tube tube and is clamped with two elements, in which case a fixing of the bracket or the temple ends preferably takes place on the magnetic body and the Tubusrohr bordered by the bracket, enclosed or is encompassed. Also, the means or the means can be designed as a connector or plug connection. Here, a clamping connection is provided in addition to the caulking or bracing of Tubusrohrs with the magnetic body. The connector has for this purpose corresponding recesses or projections. The connection or attachment of the magnetic body on Tubusrohr can also be done by a clip. This is a combination of the properties of a clip and a bracket and is braced on the one hand with the tube tube or the magnetic body and on the other hand enclosing the Tubusrohr or the magnetic body, to ensure a reliable connection between the two components of the electromagnet. Another possibility for carrying out the means for fastening is that this is designed as a clamping ring. For this purpose, the tube tube or the magnetic body has an annular circumferential groove, for example, into which the clamping ring is pressed or inserted. There is also the possibility that the tube tube has a groove-shaped depression in the manner of a bead into which the clamping ring or parts of the clamping ring engage or with which the clamping ring is clamped or clamped. The same or a similar arrangement can of course also be attached to the magnet body. The connection between Tubusrohr and magnetic body is then as follows: First, the Tubusrohr made and here, if necessary, appropriate recesses or projections arranged. Thereafter, the magnetic body is placed or pushed onto the tube tube and fixed here for example in a press fit. Subsequently, a permanent fixing of the magnetic body takes place on the tube tube and thus the assembly of the electromagnet by arrangement of the fastening means. If a clamping ring is provided here, for example, then the clamping ring is first pushed onto the tube tube until the region of the clamping ring reaches the annular groove or bead-like depression provided on the tube tube or on the magnetic body. By snapping or snapping the clamping ring in this recess, this is set to Tubusrohr or magnetic body. Subsequently, then a compression or caulking of the clamping ring or a part thereof, so that it rests on the magnetic body or on the tube tube without play and connects the two elements of the electromagnet permanently, reliably and stably. The said means for fixing all allow a reliable connection between the tube tube and the magnetic body and can also be arranged and manufactured particularly simple and therefore cost. In order to ensure an electrical connection of Tubusrohr and magnetic body, it is considered favorable if the means for fixing is formed as an electrically conductive element or if the electrically conductive element is connected to the means for attachment or integrated into this. A connection or integration of the electrically conductive element in the means or with the means can be formed fixed or detachable. Of course, there is also the possibility that a firm connection between the electrically conductive element and means for attachment only by or when placing, plugging, screwing or clamping the means for attachment to tube tube or magnetic body is created. In addition, the electrically conductive elements or the electrically conductive element already in advance be integrated in the means for attachment and an electrically conductive activation of the element only during or after screwing, clamping, placing, plugging or otherwise arranging the means on Tubusrohr or on the magnetic body are performed. As low is considered in this context, when the electrically conductive element is formed as a disc. This offer, for example, versions as a spring washer, wave washer or disc, on the one hand can ensure a backup of the fastener and on the other hand a permanent and very stable electrical contact or connection of the magnetic elements. The spring washer, as an embodiment of the usable as electrically conductive element disc is thereby deformed by attaching, clamping, or attaching the executed whatever means for attachment and this applied on the one hand to the tube tube and on the other hand to the magnetic body or pressed so that Here is an electrical connection is given. According to a similar principle, the use of a wave or rag wheel works, in the latter already deformed areas are provided, which can be applied to the tube tube on the one hand and the other on the magnetic body, to improve the electrical connection of these elements. In addition to the design of the electrically conductive element as a disk, it is also possible to perform this as a ring, which is inserted over the tube tube and applied to the magnetic body. Here, too, a determination of the magnetic body on the tube tube can already be done by the ring alone by the ring serves as a means for attachment on the one hand and as an electrically conductive element on the other. The ring is then permanently connected to either the tube tube or the magnetic body, for example, inserted into a corresponding recess, groove or groove on Tubusrohr or magnetic body and then caulked or pressed with the magnetic body or Tubusrohr. This also ensures that the electrically conductive element remains flexible within limits and thus can react to movements of the magnetic body on the tube tube or displacements of the Tubusrohrs in the magnetic body without the electrical connection between the components breaks off. Also, to further improve the electrical connection of the ring may be formed as a toothed ring or in the manner of a toothed disc. When attaching, placing, plugging, screwing or clamping the means for attachment is then carried out by the ring damage to the surface of Tubusrohrs or the magnetic body or both components, since the ring or the disc carries this special tooth-like projections. As a result of this damage to the surface, the contact surface between the electrically conductive element and tube tube or magnetic body is created or enlarged, and the electrical connection is thereby produced or improved.

If a detachable or fixed arrangement of the electrically conductive element is provided in the means for attachment in or on the tube tube and / or in or on the magnetic body, then it proves to be particularly advantageous if here a particular groove-shaped recess is provided, which is for engaging the electrically conductive element is used. This groove-shaped recess can already be provided in the manufacture of the tube tube of the magnetic body or the fastening means in this or subsequently cut here, molded, milled or introduced in any other way. For example, there is the possibility that the means for attachment is formed from a plastic. In this case, a corresponding recess can already be integrated into the workpiece during the production, which takes place, for example, in an injection molding process, or can be planned in or molded into it. In the tube tube, which can also be formed from a plastic material, the recess or recess or groove can also be introduced into the workpiece during the manufacturing process. Here, however, exists Of course, the possibility that a subsequent introduction of the recess takes place. A preferred embodiment of the invention provides that the electrically conductive element is detachably or fixedly arranged on or in the means for fastening or on the tube tube or on the magnetic body. This means that the electrically conductive element is provided on one of said components of the electromagnet and an electrical connection is made after placing, attaching, screwing, plugging or otherwise connecting the tube tube and magnetic body and / or fixing the means for fastening. In order to perform a detachable or fixed connection of electrically conductive element and means for attachment or tube tube or magnetic body here, in particular, an arrangement by gluing, melting, soldering, welding or the positive insertion or attachment of the element is particularly recommended. Another possibility is in the caulking, so the establishment of a mechanical connection. If the means for fastening, the magnetic body or the tube tube made of an electrically non-conductive material or has this areas, which are electrically non-conductive, so provides a preferred embodiment of the invention, that the electrically conductive element in the means for attachment , the magnet body or the tube tube or is formed in areas thereof, so that here nevertheless a sufficient and reliable and secure electrical contact can take place. Here, for the purpose of forming the electrically conductive element, it is possible to inject it into the workpiece blank, for example during the production process of the fastening means of the magnetic body or of the tube tube. If a casting mold is used here, the electrically conductive element can, of course, also be encapsulated with the potting compound in order to be molded into the means for fastening, the magnetic body or the tube tube. Of course, there is also the possibility of subsequent arrangement of the electrically conductive element by this is melted into the means for fixing, the magnetic body or the tube tube. The melting can take place in a particularly simple manner in that the electrically conductive element is electrically charged and thereby heated. This can be carried out at the same time a functional check of the electrically conductive element. As stated previously, the electrically conductive element can be formed as a deformable disk or deformable ring. In addition, there is also the possibility that the electrically conductive element is executed in any other way and in this case is formed deformable or braced. A contacting of the magnetic body and Tubusrohr then takes place after deformation or distortion of the electrically conductive element. In the course of deforming or bracing the electrically conductive element, an engagement of the electrically conductive element in the magnetic body and / or the tube tube take place, so that here either by the engagement of an electrical contact is made to an electrical connection or by the intervention the existing electrical contact is further improved and stabilized. The preparation of the electrical connection and the engagement of the electrically conductive element in the magnetic body and / or the tube tube can be provided before, during or after the deformation or distortion. This means that the electrically conductive element is first loosely, that is placed or applied to the barrel tube or the magnetic body in the running seat or sliding fit and then, in the course of a deformation or bracing process, a determination of the electrically conductive element. In the course of deforming or straining the electrically conductive element, it then comes to the production or training of an electrical contact or to its improvement and stabilization. The electrically conductive element is designed in a preferred embodiment of the invention that a radial or axial contacting of the magnetic body takes place, wherein on the other hand takes place an axial and / or radial contacting of the Tubusrohrs. Of course, there is also the possibility that the electrically conductive element of one of the components, that is, the magnetic body or the Tubusrohr radially contacted and the other part, that is, the magnetic body or the Tubusrohr axially contacted on the other hand. Axial and radial contacting, for example, of the tube tube can be achieved by providing a circumferential annular groove therein by engaging a portion of the electrically conductive element and then abutting a further region of the electrically conductive element in the axial direction on the tube tube in parallel to the surface or parallel to the circumference. With respect to the magnetic body, there is also the possibility that a region of the electrically conductive element rests on a first surface of the magnetic body and extends radially into this surface, while a second region is arranged coaxially to the magnetic body and abuts axially on a further surface of the magnetic body.

According to the invention, it is also provided that the electrically conductive element or the means for fastening formed in particular as a disk, ring or clamp comprises cutting edges, ridges or cut edges, and thus a contacting surface on the magnet body and the tube tube during insertion, attachment, placement, clamping, bracing or caulking independently produces.

In this case, it is provided that the cutting edges engage in the material of the magnetic body and / or the tube tube by cutting edges, and here ablate a surface layer and are permanently fixed in the material of the magnetic body or of the tube tube. The electrically conductive element is interlocked, for example, with the magnetic body and the tube Tubus or clings in this firmly and thereby partially ruptures the surface of Tubusrohres and / or the magnetic body, creating or enlarging a bare contact surface and the permanent conductivity is ensured.

In the interest of saving material in the manufacture of the electrically conductive element this can be made as a disc or ring and the ring thickness or the thickness largely reduced so that it measures only a few millimeters to tenths of a millimeter. The disc or the ring can also be formed as a film. Another embodiment is that the disc or the ring has arranged on the inner or outer circumference radial Ausbrechungen. The breaks are then to be understood as a material-free space of the disc or ring. Remains of the disc or ring body remain between the breaks, so that the disc or the ring is ultimately formed in the manner of a toothed ring with projections on the outer and inner circumference. In order to be able to ensure a reliable and stable electrical connection between the tube tube and the magnet body, it can be provided here that the remaining remainders of the annular body are deformed, in particular bent, in alternation in the direction of the tube tube or the magnetic body or radially or axially aligned therewith and on the one hand contact the Tubusrohr and on the other hand, the magnetic body.

Since the electrically conductive element is designed to be permanently current-carrying, there is the possibility here that corosion forms. In order to prevent this, a preferred embodiment of the electromagnet according to the invention provides that at least one seal enclosing the electrically conductive element is provided.

The electrically conductive element can, for example, between at least two arranged in the axial direction of the Tubusrohrs sealing elements are arranged. When assembling or in the formation of the electromagnet, the magnetic body is first pushed onto the tube tube or plugged and fixed to this already in the running seat or press fit. Next, a first seal, such as a sealing ring or a sealing lip or gasket, is pushed onto the tube tube, after which then placing, pushing, chiselling, clamping or screwing the electrically conductive element takes place. Thereafter, a second seal, which in turn may be formed as a disc, ring, lip or in any other suitable manner, pushed onto the tube tube, whereby the electrically conductive element between two arranged in the axial direction of the tube tube sealing elements is arranged. Alternatively or additionally, of course, there is also the possibility that the electrically conductive element is molded or injected into the seal, that is, is substantially integrated in the seal. In this case, a complete enclosure of the electrically conductive element can be provided by the material of the seal or by the seal itself. If this is the case, then the electrically conductive element breaks through the seal at least in sections in the radial and axial direction and contacts the tube tube and the magnet body. Preferably, a breakthrough or puncturing of the seal takes place only during deformation or distortion of the electrically conductive element. It is provided that the electrically conductive element is completely surrounded by sealing material and thus has, for example, in unassembled state shape and appearance of a sealing ring or a sealing washer. After placement of the element on the Tubusrohr or after arranging in the means for attachment and after setting in the electromagnet according to the invention, the sealing material of the internally disposed in the interior electrically conductive element at least partially broken both radially and axially in the course thus made a contact of the Tubusrohrs and the magnetic body. In order to make a satisfactory opening here, the electrically conductive element conveniently has corresponding cutting edges, ridges or protrusions capable of penetrating through the elastic material of the seal. There is also the possibility that, for example, when using a ring or a disc on the surfaces of the disc or ring, a sealing material is glued, sprayed, welded or arranged in any other way and so already provided the electrically conductive element with seals in Electromagnet can be arranged. Again, there is the possibility that the electrically conductive element breaks through the seal only partially and so only a partial electrical contact is made via the electrically conductive element. A preferred embodiment of the insertable in the electromagnet according to the invention electrically conductive element provides that the electrically conductive element engaging means, and here, for example, cutting, protruding ridges or cut edges that perform a violation of the surface of the stomach body and / or Tubusrohres to here the electrical Establish contact or improve. Due to this engagement in the surface of the magnetic body or of the tubular tube, however, a corrosion-protecting oxide layer which forms with appropriate treatment on the surfaces is injured or removed, so that corrosion points form here, in particular at the points of contact or the contact surfaces of the cutting edges, ridges or cut edges , In order to achieve a practically airtight seal of the electrically conductive element relative to the surrounding atmosphere, in a preferred embodiment of the electromagnet, the arrangement of seals is provided in the means for attachment, wherein the seals arranged here are spaced from the electrically conductive element. Provided here is a first Seal, which rests axially on Tubusrohr and a second seal, which seals radially on the magnetic body. Between these two seals, which may be inserted or introduced, for example, injected or molded, for example, in corresponding recesses or grooves in the means, then the electrically conductive element and is through the seals, for example, as a sealing ring, sealing strip, sealant or sealing tape may be formed, protected against moisture penetration. The seals are arranged spaced apart from the means for fixing the electrically conductive element, so that there is at no time the risk that a violation of the seals by the partially sharp-edged electrically conductive element takes place.

Conveniently, the seals used with the electromagnet according to the invention are designed as O-rings, sealing strips, sealing lips or sealing washers. In the - as already mentioned above arrangement of two seals above and below the electrically conductive element - there is also the possibility that at least two seals form a contact space on Tubusrohr or in the magnetic body in which the electrically conductive element is arranged. The seals then limit the contact space to two sides. The seals must also not be arranged directly on the electromagnet, that is to say on the tube tube and / or on the magnet body, to the electrically conductive element. It is important that the seals prevent the ingress of liquid or air, so that no corrosion of the electrically conductive element can take place.

There is also the possibility that the electrically conductive element is designed as a so-called conductive rubber. This conductive rubber then consists of carbon particles filled or offset rubber material. Using a conductive rubber provides the advantage that here an elastic permanent connection can be performed, which can ensure a stable and permanent electrical connection between Tubusrohr and magnetic body even with vibration, as this occurs on electromagnets. In addition, the sealing rubber also assumes a sealing function for the connection point or area of tube tube and magnet body.

It is also considered to be recommendable if an additional seal arranged directly on or in the electrically conductive element is provided. This seal can then be used to secure, connect or clamp the electrically conductive element with the means for attachment and at the same time seal. This is done by deforming the sealing element in a connection of the electrically conductive element and the fastening means and, in the course of this deformation, carrying out a deformation of the electrically conductive element, which is pressed into the fastening means or permanently inserted and fixed. Again, as with all other seals used, it is possible to form these wholly or partly of conductive rubber.

The electrically conductive element is formed in a preferred embodiment of the electromagnet according to the invention as a grounding strap or in the manner of a ground strap. In this case, the ground strap can have a braid formed from a wire material and can be formed from a metal strip or band or from a plastic strip offset with metal. A first end of the ground strap is provided for fixing to the tube tube, while a second end of the ground strap contacts the magnetic body. The band body, that is, the region connecting the two ends of the ground strap is arranged on or in the attachment means or fixed therein or molded into it.

It proves to be advantageous if the electrically conductive element is designed as an at least partially electrically conductive coating of the means for attachment. The coating can ensure that a sufficiently large surface is provided for electrical contacting. Moreover, the coating can remain stably attached to the fixing means even if it is deformed. If, for example, the fastening means is designed as a fastening nut, it is possible that here the thread of the nut or its entire surface is provided with an electrically conductive coating. By screwing the nut on the Tubusrohr or the magnetic body is then the electrical connection. Of course, there is also the possibility that the means for attachment of an electrically conductive material is formed and having a protective coating, which is damaged or removed when arranging the means for attachment to the tube tube and / or the magnetic body and an electrical contact takes place only then. In addition, there is also the possibility that the means for attachment, for example, formed from an electrically non-conductive base material, which is acted upon with conductive material, in the example, conductive particles such as metal particles or chips or graphite or carbon dust was mixed. This then an electrical conductivity of the means for attachment is achieved, which is later used for the electrical connection of Tubusrohr and magnetic body.

The invention also provides an electromagnet having a housing enclosing the tube tube and the magnetic body. In order to ensure a contacting of the Tubusrohrs and the magnetic body, on the one hand there is the possibility to insert the electrically conductive element in the housing and on the means for fixing a determination of Tubusrohr, housing and magnetic body perform. In the course of this determination is then made the electrical contact or connection of the magnetic body and Tubusrohr. In addition, it is also possible, the electrically conductive element in such a way that an electrical connection of housing, magnetic body and Tubusrohr can take place via the electrically conductive element. Here, the use of all the aforementioned embodiments of the electrically conductive element or the means for attachment is possible, wherein only the housing of these components of the electromagnet is also included or fixed with or contacted.

The electromagnet according to the invention is preferably suitable for an operating voltage in the low-voltage range, that is, between 12 V and 400 V. It is considered favorable when a voltage between 12 V and 230 V, between 12 V and 48 V or between 12 V and 35 V is applied to the electromagnet. Of course, it is also possible to apply operating voltages which are higher or lower, that is to say in a range below 12 V or above 400 V at the electromagnet. The electrically conductive element must then be designed so that these voltages can be absorbed.

It is understood that the features mentioned above and those yet to be explained not only in the respective combination specified but also in other combinations conceivable and can be used or used.

Fig. 1

einen schematischen Querschnitt einer Seitenansicht eines erfin-

Fig. 2a

dungsgemäßen Elektromagneten; einen schematischen Querschnitt einer weiteren Seitenansicht eines erfindungsgemäßen Elektromagneten;

Fig. 2b

eine Detaildarstellung eines Aus- schnitts des elektrisch leitenden Elementes in einer Einbauposition an einem Elektromagneten;

Fig. 3a

eine Draufsicht auf eine Ausfüh- rungsform des erfindungsgemäßen Elektromagneten

Fig. 3b

eine Ausschnittsdarstellung aus der Draufsicht der Fig. 3b;

Fig. 4a

eine weitere Draufsicht auf eine bevorzugte Ausführungsform des er- findungsgemäßen Elektromagneten;

Fig. 4b

eine Ausschnittsdarstellung aus der Draufsicht der Fig. 4a; und

Fig. 5

perspektivische Schnittdarstellung eines in eine Dichtung eingeform- ten elektrisch leitenden Elemen- tes.

The invention is explained in more detail below with reference to embodiments with reference to the accompanying drawings. Show it:

Fig. 1

1 is a schematic cross section of a side view of an invention

Fig. 2a

to the invention electromagnet; a schematic cross-section of another side view of an electromagnet according to the invention;

Fig. 2b

a detailed representation of a section of the electrically conductive element in an installed position on an electromagnet;

Fig. 3a

a plan view of an embodiment of the inventive electromagnet

Fig. 3b

a sectional view of the top view of Fig. 3b ;

Fig. 4a

a further plan view of a preferred embodiment of the inventive solenoid;

Fig. 4b

a sectional view of the top view of Fig. 4a ; and

Fig. 5

perspective sectional view of a formed in a gasket electrically conductive ele- tes.

The Fig. 1 shows an electromagnet 10 in cross section in a side view. In a cylindrical tube tube 11, an armature 13 is arranged. Mounted on the tube tube 11 is the magnetic body 12, all of which are essential for an electromagnet 10, but in connection with the present invention Invention not further explained components of an electromagnet 10 has. The magnetic body 12 has been in the embodiment of Fig. 1 attached to the tube tube 11 and is held on this in the sliding seat. The upper, in Fig. 1 The right end of the electromagnet 10 forms a fastening nut 20, which has an internal thread 15 which is screwed to the compressed with the tube tube 11 magnetic core 16. The fastening nut 20 serves as a means 14 for fastening the magnetic body 12 on the tube tube 11. This is a permanent determination of these two components of the electromagnet 10 is achieved. This compound is improved by screwing the mounting nut 20 with the magnetic core 16, wherein the fastening nut 20 presses the magnet body 12 with the tube tube 11. The magnetic body 12 is in electrical connection with the tube tube 11. Due to the fact that the magnetic body 12 is applied only in sliding fit on the tube tube 11, there is the possibility that these two components of the electromagnet 10 during operation, which is associated with experience with vibrations to solve each other. With the release of magnetic body 12 and tube tube 11 and the existing between these two components electrical connection is interrupted and it can then no adequate grounding of the electromagnet 10 and the tube tube 11 and the magnetic body 12 are more guaranteed. In order to ensure a permanent and reliable protection of the electromagnet 10 by a stable and, above all, difficult to disassemble electrical connection between tube tube 11 and magnetic body 12, has in Fig. 1 Electromagnet 10 shown an electrically conductive element 17, on the one hand touches the outer surface 18 of the Tubusrohrs 11 and on the other hand, the surface 19 of the magnetic body 12 and here ensures an electrical connection. The electrically conductive element 17 is formed in the embodiment as a partial ring which surrounds the tube tube 11 in regions. In the cross section of the ring whose structure is recognizable. These has a first arc 20 b, which causes a certain bias of the electrically conductive element 17 with respect to the surface 19 of the magnetic body 12. Aligned to the tube tube 11, the ring has a second arc 20a, which also causes a bias of the electrically conductive element 17 here. The partial ring, as the electrically conductive element 17 is formed, also has a circumferential groove 21, which serves as a receptacle or as an insertion point or surface for a sealing ring 22a. The electrically conductive element 17 is integrated in the exemplary embodiment in the fastening nut 20. Due to the bias of the electrically conductive element 17 through the two sheets 20a, 20b this is in the course of screwing the fastening nut 20 on the magnetic core 16 with the tube tube 11 on the one hand and the magnetic body 12 connected on the other hand and after completion of Aufschraubvorgangs is the electrically conductive element 17th then in a cocked position, so that here is a permanent and reliable or stable electrical connection of the magnetic body 12 and tube tube 11 is given. In the manufacture of the fastening nut 20 with integrated or inserted therein electrically conductive element 17 is first the electrically conductive element 17 in the fastening nut 20, which for this purpose has a special recess, for example, a circumferential annular groove or depression used. Subsequently, the seal 22a is placed on the electrically conductive element 17 and thereby pre-deformed in the direction of the fastening nut body. In the course of this deformation by the seal 22a, the arches 20a and 20b bulged so that they protrude from the recess or groove in the mounting nut 20 and are aligned with the tube tube 11 on the one hand and the magnetic body 12. The electrically conductive element 17 is not formed in the embodiment as a completely circumferential ring 27, but as the tube tube 11 only along a portion of the circumference comprehensive sub-ring. Of course There is also the possibility of forming the electrically conductive element as the tube tube 11 completely enclosing ring 27 or as a disc. In addition, it is also possible to arrange a plurality of electrically conductive elements 17 in the fastening nut 20, which are designed, for example, as ring sections. The two ends of the electrically conductive element 17 formed as arcs 20a, 20b contact the tube tube 11 and the magnetic body 12. The magnetic body 12 is contacted by the first arc 20b of the electrically conductive element 17 extending radially with respect to the electromagnet 10, while the second Arc 20a, the tube tube 11 contacted in the axial direction. The joint 23 between the upper end of the magnetic body 12 and the tube tube 11 inserted therein additionally seals the seal 22a used in the fastening nut 20 for holding the electrically conductive element 17 and prevents the penetration of moisture or the like. In order to protect the electrically conductive element 17 from corrosion, the fastening nut 20 additionally has two further seals 22b, 22c, which are sunk into the corresponding receiving grooves 24 in the fastening nut 20 associated with the electrically conductive element 17. The seals 22b, 22c have a total of the same length as the electrically conductive element 17, which is also arranged in the fastening nut 20. In order to provide a clearly defined insertion position for the electrically conductive element 17 in the fastening nut 20, along its circumference facing the magnetic body 12 has a shoulder 22 formed in the fastening nut 20, which shoulder passes through the electrically conductive element 17 after completion of the insertion or placement the fastening nut 20 rests on the tube tube 11.

Of course, there is also the possibility that no fastening nut 20 is used to secure the connection between the magnetic body 12 and tube tube 11, respectively to improve. Rather, instead, the electrically conductive element 17 may be formed as a connecting means. The electrically conductive element 17 is then formed as a clip or bracket, or as a disc or ring. In this embodiment, ie in the embodiment without fastening nut 20 or other means 14 for fastening, the electrically conductive element 17 is formed, for example, as a ring having a projection for engagement in the tube tube 11. The tube tube 11 in turn has in this case a circumferential annular groove, a bead or other recess 30 or depression, in which a projection on the electrically conductive element 17 is inserted, glued, welded or soldered. The thus fixed to the tube tube 11 electrically conductive element 17 is bent afterwards in the direction of the magnetic body 12 or deformed in any other way and thereby applied to the surface 19 of the magnetic body 12. After a final compression or caulking of the electrically conductive element 17, a permanent and resilient connection of tube tube 11 and magnetic body 12 is performed. In addition, it is also possible, as a means 14 for attachment of magnetic body 12 and tube tube 11 a circumferential, staggered with an electrically conductive material rubber seal on the tube tube 11 set up, which is then deformed.

This rubber seal has conductive particles, such as carbon particles. Of course, there is also the possibility that the rubber seal has only a conductive coating.

Fig. 2a shows a schematic cross section through a further side view of an electromagnet 10 according to the invention. This also has a tube tube 11, on which a magnetic body 12 has been placed. The magnetic body 12 is fixed here in a press fit on the tube tube 11. The means 14 for Attachment of the magnetic body 12 on the tube tube 11 is in the embodiment of Fig. 2a formed as a cap 25 which is attached to the protruding from the magnetic body 12 end of the tube tube 11 and is also fixed here in a press fit. As an electrically conductive element 17, a ring 27 is provided with a double-L-shaped profile in the embodiment. This is especially in Fig. 2b particularly clear. The ring 27 is integrated into the cap 25 and here in a trained according to the profile shape of the ring 27 shoulder 22 attached. During placement of the cap 25 on the end of the Tubusrohrs 11, the ring 27 drags along the outer surface 18 of the Tubusrohrs 11 and contacted in the axial direction of the Tubusrohr 11. The second end of the ring 27 or ring profile is after complete placement of the cap 25 the tube tube 11 is applied to the cap 25 facing surface 19 of the magnetic body 12. A determination and permanent securing of the cap 25 takes place in that the ring 27 is inserted into a gap between the tube tube 11 and the inner peripheral surface of the cap 25 and thus clamped relative to the tube tube 11. In order to prevent the ring 27 from falling out of the cap 25, a sealing ring 22a inserted in the inner profile of the ring 27 is provided here, which clamps the ring 27 with the cap 25. In order to secure the contact space of ring 27, tube tube 11 and magnetic body 12 against moisture penetration, and thereby to prevent corrosion that could constitute a deterioration of the electrical connection, two additional recesses are provided in the cap 25, in the further sealing rings 22c, 22b are used. These sealing rings 22b, c are on the one hand on the outer surface 18 of the Tubusrohrs 11 and the other on the surface 19 of the magnetic body 12 and seal the contact space. In addition to the arrangement of an electrically conductive element 17 in the cap 25 here is the possibility that the inner peripheral surface of the cap 25, which contacts on the one hand the tube tube 11 and the other the magnetic body 12, with an electric conductive layer or coating is coated. After placing the cap 25, this coating contacts on the one hand the tube tube 11 and on the other hand, the magnetic body 12 and thereby also improves the electrical connection between the components.

In Fig. 2b is already related to Fig. 2a described embodiment, reproduced in part. Shown here is the in Fig. 2a with a frame marked section in an enlarged view. Here, in particular, the shape and the profile of the ring 27 can be seen as a double-L. The cap 25, which is also shown in fragmentary form, has on its outer peripheral surface in addition to a non-slip coating 29, which simplifies the placement of the cap 25 on the tube tube 11 and improved. Because of this non-slip coating 29, a particularly permanent connection between the cap 25 and the tube tube or a satisfactory application of the cap 25 on the surface 19 of the magnetic body 12 can be performed because during the Aufsetzprozesses the cap 25 slipping or slipping of the tool by the non-slip or slip-resistant coating 29 is prevented.

The Fig. 3a shows a plan view of an embodiment of the electromagnet 10 according to the invention. Also visible here is the tube tube 11, which is arranged centrally in a magnetic body 12. The magnetic body 12 has been pushed during assembly on the tube tube 11 and fixed in this press fit. In order to secure a permanent connection between the magnetic body 12 and tube tube 11, arranged on the upper surface 19 of the magnetic body 12 as a bracket 32 means 14 is arranged for attachment, on the one hand fixed to the magnetic body 12, for example, soldered, welded, glued and on the other hand the tube tube 11, which has a special recess 30 for this purpose, is used. The clip 32, in the Fig. 3b is shown in more detail, in addition to a projection 33 in addition to a cutting edge 34, which performs a damage of the uppermost layer of Tubusrohrs 11 during assembly of the electromagnet 10 according to the invention and here causes or improves electrical contact. The clamp 32 can already be arranged in the production of the magnetic body 12 at this. However, there is also the possibility that a subsequent arrangement takes place. For this purpose, a recess or the like can be provided in the magnetic body 12 or in its surface 19, into which the clamp 32 is inserted. In the course of placing the magnetic body 12 on the Tubusrohr 11, the clip 32 is slightly deformed and then locks with the projection or the blade 34 disposed thereon in an annular groove-like recess 30 in the tube tube 11, here later or already in the production of Tubusrohrs 11th can be introduced and secures the magnetic body 12 against slipping or slipping of Tubusrohr 11. The bracket 32 is wholly or partially formed of an electrically conductive material. It is accomplished via the bracket 32, a radial contacting of the magnetic body 12 and a radial contacting of the tube tube 11. Depending on the shape of the clip 32 may, if this example, in the axial direction of the tube tube 11 bent further projections, an axial contacting of the tube Tubus be performed.

In Fig. 4a a further plan view of a preferred embodiment of the electromagnet 10 according to the invention is shown. This also has a tube tube 11 which is connected to a magnetic body 12. To secure the magnetic body 12 on the tube tube 11 is a means 14 for fixing a in the sectional view of Fig. 4b clearly visible snap ring 36 is provided, which is inserted into a ringnutartige recess 30 in the tube tube 11. To mount the electromagnet 10 of the snap ring 36 is bent over the Tubus tube 11 striped and then solved so that it jumps into the recess 30 in the tube tube 11. The protrusions 37 provided on the snap ring 36 serve on the one hand to bend the snap ring 36 or to engage a corresponding tool or pliers, on the other hand these protrusions 37 also improve the electrical contacting of the magnetic body 12 and the tube tube 11, since these are in the radial direction on the Magnet body 12 abut. The protruding from the recess 30 portion of the snap ring 36, the in Fig. 4b can be seen, also causes an electrical connection of Tubusrohr 11 and magnetic body 12, in which case an axial abutment on Tubusrohr 11 and a radial abutment on the magnetic body 12 is provided. The in the Fig. 3a, 3b, 4a and 4b illustrated embodiments of the electromagnet 10 come without additional means 14 for attachment, such as fastening nuts 20 or caps 25 from. The determination or securing of the magnetic body 12 on the tube tube 11 and the production of an electrical connection between these magnetic components is only on the additional elements bracket 32, as in Fig. 3a represented, or snap ring 36, as in Fig. 4a, 4b represented, accomplished. This embodiment of the electromagnet 10 according to the invention thus proves to be particularly cost-effective to manufacture, since on the one hand a few, cost-effective components are used, and on the other hand, the assembly effort is significantly reduced due to the easy on or add elements. The connection is thus carried out with the least possible effort, but still provides a reliable and stable connection of magnetic body 12 and tube tube 11 and a durable and durable, as flexible and flexible electrical connection of the components tube tube 11 and magnetic body 12. Also becomes so too under load sufficient electrical contact and thus grounding of these electromagnets 10 ensured.

Fig. 5 shows a perspective sectional view of an integrally formed in a seal 22a electrically conductive element 17. This electrically conductive element 17 is designed here as a ring 27, which has on the one hand radially and the other axially to the tube tube 11 extending portions 28. In the assembled state of the electromagnet 10, the regions 28 which extend radially to the tube tube 11 contact the tube tube 11, while the regions 28 formed axially to the tube tube 11 contact the magnetic body 12 and thus ensure electrical contacting of these two components of the electromagnet 10 via the ring 27. The ring 27 is completely received in the embodiment in a seal 22 a. In the manufacture of the electrically conductive element this is encapsulated or foamed by a sealant, such as a rubber compound or other sealing material and is almost completely integrated into the seal 22a before. Only the regions 28 break through or project through the sealing body. It is thus protected by the in Fig. 5 illustrated embodiment of the electrically conductive element 17 reaches a maximum possible sealing of the element, since the seal 22a has two sealing beads 26a, b, which can be used for example in corresponding recesses or groove-shaped depressions in the means 14 for attachment and cause an additional seal here. The electrically conductive element 17 is thus optimally protected against corrosion and nevertheless ensures a satisfactory electrical contact between the tube tube 11 and the magnetic body 12. A possible further embodiment of the in Fig. 5 shown electrically conductive element 17 provides that the electrically conductive element 17 is completely surrounded by a sealing material and only when placing and clamping the electrically conductive element 17 on the tube tube 11 and the magnetic body 12 by means of possibly sharp-edged projections 37 breaks through the sealant and then, on the one hand, the tube tube 11, on the other hand contacted the magnetic body 12.

The claims now filed with the application and later are attempts to formulate without prejudice to the attainment of further protection.

If, on closer examination, in particular also of the relevant prior art, it appears that one or the other feature is beneficial for the purpose of the invention, but not of decisive importance, it is of course already desired to formulate such a feature , in particular in the main claim, no longer having.

It should further be noted that the embodiments and variants of the invention described in the various embodiments and shown in the figures can be combined with one another as desired. Here, one or more features are arbitrarily interchangeable. These feature combinations are also disclosed with.

The references cited in the dependent claims indicate the further development of the subject matter of the main claim by the features of the respective subclaim. However, these are not to be understood as a waiver of obtaining independent, objective protection for the features of the dependent claims.

Features that have hitherto been disclosed only in the description may be claimed in the course of the method as of essential importance to the invention, for example to distinguish from the prior art.

Features which have been disclosed only in the description, or also individual features of claims comprising a plurality of features, may at any time be included in the first claim for distinction from the prior art, even if such features are associated with others Characteristics were mentioned or achieve particularly favorable results in connection with other features.

Claims (15)

Electromagnet with a tube tube as a guide for a magnet armature and a magnet body, wherein the magnet body is connected to the Tubusrohr, characterized in that at least one means (14) for fixing the magnetic body (12) on the tube tube (11) is provided and the means ( 14) at least one on the one hand the tube tube (11) and on the other hand, the magnetic body (12) contacting, electrically conductive element (17) for electrical connection of Tubusrohr (11) and magnetic body (12). Electromagnet according to claim 1, characterized in that the means (14) for fastening as a nut (20), clip, splint, bracket, connector, clip, clamping ring, sealing element o. The like. And to the tube tube (11) and / or the Magnetic body (12) up or plugged, screwed or clamped or formed with this caulking, wherein the means (14) for attachment as an electrically conductive element (17) or the electrically conductive element (17) fixed or releasably connected to the means (14) or is integrated in this. Electromagnet according to claim 1 or 2, characterized in that for detachable or fixed arrangement of the electrically conductive element (17) in the means (14) for attachment, in the tube tube (11) and / or in the magnetic body (12) has a particular groove-shaped recess ( 30) is provided for engagement of the electrically conductive element (17). Electromagnet according to one or more of the preceding claims, characterized in that the electrically conductive element (17) releasably or fixedly arranged on or in the means (14) for fastening or on the tube tube (11) or on the magnetic body (12), in particular glued, fused, soldered, welded, caulked or inserted and / or the electrically conductive element (17) in the means (14) for attachment, the magnetic body (12) or the tube tube (11) is formed, in particular injected or fused , Electromagnet according to one or more of the preceding claims, characterized in that the electrically conductive element (17) is formed deformable or bracing and a contacting of the magnetic body (12) and Tubusrohr (11) after deformation or distortion of the electrically conductive element (17) produced is, in particular wherein an engagement of the electrically conductive element (17) in the magnetic body (12) and / or the tube tube (11) before, during or after the deformation or distortion is provided. Electromagnet according to one or more of the preceding Claims, characterized in that the electrically conductive element (17) the magnetic body (12) radially and / or axially and the tube tube (11) axially and / or radially contacted. Electromagnet according to one or more of the preceding claims, characterized in that the electrically conductive element (17) as a disc, in particular spring washer, wave washer, pulley, toothed washer or as a ring (27), in particular as a spring ring, tab ring, ring gear or snap ring or as elastic Element, in particular as a conductive rubber element, is preferably formed as a conductive rubber ring and / or the electrically conductive element, in particular the disc or the ring (27) cutting (34), burrs or cut edges to form at least one contacting surface on the magnetic body (12) and / or on the tube tube (11). Electromagnet according to one or more of the preceding claims, characterized in that over the cutting edges (34), burrs or cut edges a violation of a surface of the magnetic body (12) and / or of the Tubusrohres (11), in particular a scratching or tearing of the surface to form a bare contacting surface is feasible and / or the disc or the ring (27) arranged on the inner and / or outer circumference radial Ausbrechungen, and the remaining between the breakings disc or ring body in alternation in the direction of the tube tube (11) and des Magnet body (12) or radially or axially aligned, in particular bent, is formed. Electromagnet according to one or more of the preceding claims, characterized in that a seal (22) enclosing the electrically conductive element (17) a) is provided and / or the element (17) between at least two in the axial direction of the tube tube (11) arranged seals (22 a, c) is arranged and / or wherein the element (17) in the seal (22 a) formed or is injected and the seal (22 a) during the deformation or distortion in the radial and / or axial direction preferably breaks through or pierces sections and the tube tube (11) and the magnetic body (12) contacted. Electromagnet according to one or more of the preceding claims, characterized in that on the means (14) for fastening seals (22 b, c) are provided, wherein the electrically conductive element (17) between the seals (22 b, c) is arranged and a first seal (22c) bears axially on the tube tube and a second seal (22b) rests radially on the magnet body and / or the seal (22a, b, c) is designed as an O-ring, sealing band or sealing lip and at least two seals (22a, b, c) define a contact space in which the electrically conductive element (17) is arranged after two sides. Electromagnet according to one or more of the preceding claims, characterized in that a directly on or in the electrically conductive element (17) arranged additional seal (22 a, b, c) is provided, in particular wherein the seal (22 a, b, c) the electrically conductive element (17) with the means (14) for attachment connects or braced. Electromagnet according to one or more of the preceding claims, characterized in that the electrically conductive element (17) is designed in the manner of a ground strap, wherein a first end of the ground strap the tube tube (11) and a second end of the ground strap the Magnet body (12) contacted and the band body is arranged in or on the means (14) for attachment. Electromagnet according to one or more of the preceding claims, characterized in that the electrically conductive element (17) is designed as an at least partially electrically conductive coating of the means (14) for attachment, in particular wherein the coating only after appropriate loading of the means (14) for Attachment the Tubusrohr (11) and the magnetic body (12) contacted. Electromagnet according to one or more of the preceding claims, characterized in that a housing enclosing the tube tube (11) and the magnetic body (12) is provided and an electrical connection between the housing, the tube tube (11) and / or the magnetic body (12). via the contacting, electrically conductive element (17) can be produced. Electromagnet according to one or more of the preceding claims, characterized in that the means (14) for attachment of an electrically non-conductive base material, which is acted upon with conductive material, is formed, in particular wherein the electrically non-conductive material metal particles or chips, graphite - Has or carbon dust as admixture or as a coating.

Images