EP2690634B1 - Coil - Google Patents

Description

The invention relates to a coil such as is used, for example, as a magnetic coil in an electromagnet, consisting of a coil body which carries a plurality of turns of a conductive wire and wherein the coil body has at least one holding element for the mechanical fixing of a wire beginning and a wire end of the turns , and at the beginning of the wire and the end of the wire, the electrical connector for connecting to an electrical supply or discharge line.

Conventional bobbins are designed in such a way that adapted bobbins or holding elements arranged there must be provided for a wide variety of connectors, geometries and embodiments. This circumstance means that before the bobbins are manufactured, the winding device must be converted to match the connector to be used. In the production of small series, this results in a high outlay for retrofitting, combined with downtimes and only unsatisfactory machine utilization.

The object of the present invention is to develop a generic coil in such a way that the coil is adapted to the intended use only via the connector.

This object is achieved by a coil according to claim 1. The coil according to the invention is characterized in that the connectors are designed as components that are separate from the holding element.

A coil according to the preamble of claim 1 is from DE202005006010U1 known.

The advantage of the coil according to the invention is that a coil body, standardized in its essential components, with a holding element arranged thereon for mechanically fixing a wire beginning and a wire end is made available and is used. The final adaptation of the coil to the planned installation situation or the design prescribed by the user takes place by subsequently arranging the connectors, which are provided as separate components. One advantage that results from this is that the coil formers with free wire ends can be produced in large numbers as standard components and, for example, can be stored. The universal holding element, which holds or carries the free wire start and the free wire end, is then used in an adaptation step to apply the respective use-dependent Plugged on the connector and conductively connected to the wire ends or the beginning of the wire arranged accordingly on the holding element. The invention also provides that standardized holding elements are provided on bobbins with different sizes, wire thicknesses, and number of windings, so that when production is changed, only the tool or the connectors to be arranged need to be converted, but all other (machine) settings can remain the same. This significantly shortens set-up times and significantly lowers production costs, for example for small series.

In a further development of the invention that is regarded as advantageous, it is provided that the holding element is designed in such a way that the beginning of the wire and the end of the wire are each fixed in spatially spaced regions. This avoids the risk of short circuits between the beginning and end of the winding.

In connection with the present invention, it is pointed out that the term turns can be replaced synonymously by the term winding or windings. The terms turns or windings are to be understood as a winding of a material running around an axis in the solid state of aggregation. In connection with the coil according to the invention, the electrically conductive wire is arranged in the form of turns on a coil body. These turns are achieved by winding the wire on the bobbin.

One embodiment of the invention provides that only one holding element is provided on the bobbin, which carries both the start of the wire and the end of the wire at a distance from one another. The free wire areas from the beginning of the wire and the end of the wire are surrounded by extensions provided on the holding elements, Projections mandrels or domes out and fixed by suitable crossover or winding. For example, the beginning of the winding and the end of the winding can be wound one or more times around a so-called winding-on dome or a mandrel-like extension on the holding element. Another wrapping or number of wraps or different numbers of wraps and wire beginning and wire end is also possible. The holding element itself can provide a guide for the free wire areas and isolate the wire end or the wire beginning from one another.

An advantageous embodiment provides only a single holding element that carries or fixes the beginning of the wire and the end of the wire in spaced-apart areas. As an alternative to this, a further development of the invention provides that the coil has two holding elements, one holding element each for the beginning of the wire and one holding element for the end of the wire. The use of two separate holding elements also allows the free wire areas to be defined and connectors adapted to the final use of the coil to be arranged later. The connectors provided as a separate component are pushed onto the respective holding elements or glued, welded or caulked to the holding element or holding elements. A possible clamping of the connector on the holding element due to the configuration of the holding element is also covered by the invention and is considered to be advantageous.

For the arrangement of the holding element, a carrier is provided on the coil, in particular on a coil flange which extends in particular radially to the coil body. According to the invention, the holding element is received by this carrier. This embodiment has the advantage that a further standardization of the coil body manufacture can be carried out.

The electrically conductive wire is first wound onto a uniform bobbin and the free wire end or the free wire beginning is then connected to a holding element that is received by the carrier. The holding element then ensures the definition of the beginning and end of the wire and is suitable for receiving or carrying a wide variety of connectors.

It is considered advantageous if the holding element is designed as a winding mandrel, which is at least partially wrapped around by the wire end or wire beginning. A further embodiment is possible here, in that the holding element has two winding mandrels, one winding mandrel for the wire end and one winding mandrel for the wire beginning. First, before the start of winding, the winding mandrel assigned to the beginning of the wire is wrapped around the beginning of the wire. After completion of the winding, the further winding mandrel assigned to the wire end is then wrapped around by the wire end and the turns are then set accordingly. The terms mandrel and mandrel can be used as synonyms in connection with the invention.

An embodiment of the device according to the invention which is regarded as advantageous provides that the connector is pushed onto the holding element. The connector, which connects the beginning of the wire or the end of the wire to an electrical supply or discharge line, is arranged on the holding element in such a way that the end of the wire or the beginning of the wire is arranged between the connector and the holding element. An alternative embodiment provides that the connector is arranged between the holding element and the wire end or wire beginning. The arrangement of the beginning of the wire or the end of the wire is also determined by the manner in which the beginning of the wire or the end of the wire wraps around the holding element or a winding mandrel advantageously provided there.

The holding element itself advantageously has recesses or grooves or the like, which enable the connector to be pushed on.

A further development of the invention which is regarded as advantageous proposes that the connector is glued, welded or caulked to the holding element or the connector is held on the holding element by clamping. In any case, it proves to be advantageous to design the connector as a component separate from the holding element and to attach the connector to a standardized coil body with windings of a conductive wire arranged there as required. The aforementioned connection options are available here. All these connection options have the advantage that they can be carried out automatically, so that the coil according to the invention can also be produced in larger series.

It is considered favorable if the carrier connects on one side to the coil or the coil flange and the carrier carries at least one holding element on the side facing away from the coil or the coil flange. The carrier can already be provided on the bobbin when it is manufactured, so that a standardized element is made available which is functionalized through the selection of a suitable holding element or a connector connected to the holding element or to the respective requirements of the subsequent use of the coil can be customized.

It has proven to be favorable if at least one guide element for the wire, in particular for the beginning of the wire and / or for the end of the wire, is provided on the carrier, the coil or the coil body. This ensures that the end of the wire or the beginning of the wire is kept separate and enables a proper winding process.

The carrier or the spool flange have lateral recesses which are spanned by the wire. The connector is then arranged on the carrier or coil flange or the holding element in such a way that an electrically conductive connection with the wire or the wire region spanning the recess is ensured. The wire lying in the area of the lateral recess is aligned in such a way that it is brought into engagement with the connector plugged onto the holding element or the carrier or coil flange. After the connector has been arranged, gluing, welding, caulking or clamping of the wire to the connector and of the connector to the carrier, coil flange or holding element can be carried out in order to produce a permanent and electrically conductive connection.

A further development of the invention provides that the coil body, the coil, the holding element or the carrier carrying the holding element has a clamping slot which is able to interact mechanically with a plug-in piece of the connector. The plug-in piece of the connector can be conveniently inserted into the clamping slot. A stabilization of the arrangement of the connector is thus advantageously achieved. In addition, the clamping connection between the holding element or the carrier coil or the coil body and the connector is significantly improved and an electrically conductive connection is ensured. The clamping slot is preferably aligned perpendicular to the coil body, but can also run parallel to the coil axis or have another alignment that is considered favorable.

Equally of inventive importance is a method for assembling a magnet coil according to claim 1, for example for an electromagnet, the magnet coil having a bobbin on which an electrically conductive wire is wound with a plurality of turns. The method according to the invention provides that the beginning of the wire or the end of the wire is fixed on at least one holding element. In a further method step, the magnetic coil is completed with connectors, in particular from a group of partially different connectors. It is completed in that the connector is conductively connected to the wire in a contact area. The contact area is provided on the connector. The beginning of the wire or the end of the wire is fixed on the holding element in such a way that the contact area of the connector and the beginning of the wire or end of the wire are brought into contact when the connector is arranged and a conductive connection is thereby established.

A further development of the method according to the invention provides that the connector, together with the electrical connection, is mechanically connected to the coil body, the coil, the holding element or the carrier carrying the holding element. The connection is made, for example, by gluing, welding or caulking or by simply plugging the connector onto the holding element. In addition or alternatively, a clamping connection can also be made available by engaging the connector with corresponding recesses, grooves or the like provided on the holding element.

In a preferred embodiment, the method according to the invention provides that the completion of the magnet coil with connectors takes place separately from the winding process of the magnet coil in terms of location and / or time. This embodiment makes it possible to provide a standardized, prepared coil or a coil former, which carries the electrically conductive wire, and a subsequent, adapted arrangement of correspondingly functionalized connectors. For this purpose, the wound magnet coil can, for example, be produced in large numbers from standardized components and then stored. In a completion order, the connectors are then arranged on the prepared coils or coil bobbins, thereby completing the coil. This results in significantly shorter set-up times, which more than compensate for the storage costs arising from storage. In addition, it is also possible to react to small series production orders with little effort, without having to carry out a complete adaptation of the entire tools and machines for producing the coils, in particular when coil bodies of different sizes always have the same holding elements.

In this context, it is pointed out in particular that all the features and properties described in relation to the device, but also procedures, can be transferred and used in the sense of the invention and are also disclosed as being also disclosed with regard to the formulation of the method according to the invention. The same also applies in the opposite direction, that is, structural features, that is to say device-related features, mentioned only in relation to the method can also be used in the The scope of the device claims are taken into account and claimed and also count towards the invention and the disclosure.

Fig. 1a

eine Spule in Draufsicht;

Fig. 1b

das Halteelement der erfindungsgemäßen Spule in Seitenansicht;

Fig. 2a

eine erfindungsgemäße Spule mit angeordneten Verbindern in Draufsicht;

Fig. 2b

die Spule aus Fig. 2a in Seitenansicht.

In the drawing, the invention is shown schematically in particular in one embodiment. Show it:

Fig. 1a

a spool in plan view;

Figure 1b

the holding element of the coil according to the invention in side view;

Fig. 2a

a coil according to the invention with arranged connectors in plan view;

Figure 2b

the coil off Fig. 2a in side view.

In the figures, elements that are the same or that correspond to one another are each designated by the same reference symbols and are therefore not described again unless appropriate.

Fig. 1a shows a coil 1 according to the invention in plan view. Here you can see a sign on the coil body (cf. Figure 1b ) adjoining coil flange, which is connected to the holding element 3. The coil 1 has turns 20 of a current-conducting wire 2. This wire 2 is in Fig. 1a only the beginning of the wire 21 and the end of the wire 22 can be seen, which loop around the holding element 3. The connectors 4 are shown separated from the holding element 3. A first connector 41 serves to come into contact with the beginning of the wire 21, while a second connector 42 is connected to the end of the wire 22. The connectors 4 are used to connect to an electrical supply or discharge line to the coil 1. The one here The illustrated coil 1 or its coil bobbin 10 can be made available as a standardized element and is completed by arranging, for example plugging, gluing, welding or other connection with the connectors 41, 42 to form an overall system. The connectors 4 have a plug-in piece 43 that is matched to the design of the holding element 3. Regardless of the final design of the area of the connector 41, 42 connected to the electrical supply or discharge line, the plug-in piece 43 is matched to the holding element 3 and can thus be universally connected to a standardized holding element. The final coordination of the connectors 4, 41, 42 then takes place via the areas of the connectors 41, 42, 4 adjoining the plug-in piece 43.

In the exemplary embodiment, the holding element 3 provides a total of two winding mandrels 31, 32 which are wrapped around by the wire beginning 21 and wire end 22 and thus fix the wire 3. A contact area (not shown) is provided on the connector 4 itself, which creates an electrical connection after contacting the wire 2.

The holding element 3 is in the exemplary embodiment Fig. 1a on the coil flange 11, which extends radially from the coil body 10 (cf. Figure 1b ) extends away, arranged. A corresponding extension is here, for example, molded in, injected or arranged subsequently.

The spool flange 11 itself has a guide slot 12 (cf. Figure 1b ), via which the wire 2, for example the beginning of the wire 21 or the end of the wire 22, is guided towards the holding element 3.

With the embodiment of the coil 1 according to the invention shown here, a standardized component can be available are provided, which has a simplified configuration and can therefore be manufactured in large numbers. The actual adaptation of the coil 1 to the ultimate purpose takes place through the arrangement of the connectors 4, which carry the connection elements suitable for the respective use.

It is thus possible to react quickly and in a simple manner to small series requirements via an element that is present in large numbers, without having to take up set-up times in order to have to carry out an adaptation of the entire winding machine or manufacturing device.

Figure 1b shows a coil 1 according to the invention in side view. Only a section of the coil former 10, which carries the windings 20 of the current-conducting wire 2, is shown here as an excerpt. The turns 20 are shown schematically here. The coil flange 11, which adjoins the actual coil body 10 and in the exemplary embodiment of FIG Figure 1b a carrier 30 for the holding element 3 is available. The holding element 3 was already in connection with the Fig. 1a described. The spool flange 11 simultaneously serves as a guide for the beginning of the wire 21 and the end of the wire 22 and ensures that the beginning of the wire 21 and the end of the wire 22 are kept separate in order to avoid short circuits here.

The holding element 3 has in the exemplary embodiment Figure 1b a clamping slot 33. The plug 43 of the connector 4 is inserted into this. The connector 4 is thus held in a press fit and contacts the wire end 22 or the wire beginning 21 in the lateral area of the holding element 3. Here, the wire 2 spans a recess in the holding element 3, as shown for example in Fig. 1a is recognizable. The contact area of the connector 4 engages in this spanning section on wire 2 and creates an electrically conductive connection. In Figure 1b the coil 1 according to the invention is shown in the unassembled state, that is to say without the connector 4 arranged.

Fig. 2a shows the assembly state of the coil 1 according to the invention. Here, the connectors 41, 42 were attached to the side of the holding element 3 and inserted into the clamping slots 33 provided there. The contact areas on the connectors 41, 42 encompass the wire 20 clamped on the holding element 3 and contact it. This creates an electrically conductive connection. Inlet and outlet lines 6 are connected to the connectors 41, 42. This is especially true in Figure 2b recognizable. In this case, supply and discharge lines 6 have an angled portion, via which, for example, a plug connection to a power source can be established. From the Figures 2a and 2b It can be seen that the coil 1 can be adapted to the respective areas of use through the appropriate selection of the supply or discharge lines 6 or their configuration on the connectors 41, 42. The geometry and size or shape or design of the supply or discharge line 6 can be freely selected, while a standardized element is provided with the coil 1 or the holding element 3 and the wire beginning 21 or wire end 22 fixed there. Coil 1, coil body 10 and carrier 30 or holding element 3 can thus be made available as a standardized system element. The final adaptation of the overall coil 1 takes place via the shaping of the connector 4 or their feed or discharge line 6.

In the embodiment of Fig. 2a the connector 4 is pushed onto the holding element 3. The beginning of the wire 21 runs here on the side of the holding element 3 facing away from the plug-in piece 43. The wire end 22, on the other hand, runs between the holding element 3 and the connector 4 and is thus partially removed by the plug-in piece 43 covered.

The wire end 22 or the wire beginning 21 loop around the winding mandrels 31, 32 of the holding element 3. In the embodiment of FIG Figures 1a and 2a the beginning of the wire 21 has only half a loop around the winding mandrel 31, while the wire end 22 loops twice around the winding mandrel 32 assigned to it. Depending on the diameter of the wire 2 used, a higher or lower number of wraps is necessary in order to ensure a secure hold of the wire beginning 21 or wire end 22. The arrangement is implemented by the friction existing between wire 2 and holding element 3. Overall, however, depending on the ultimate use of the coil 1, there is also the possibility of providing more than one looping. The connection area, that is to say the plug-in piece 43 of the connector 4, projects into the carrier 30 or the holding element 3. The actual contact of the connector 4 with the wire beginning 21 or wire end 22 is carried out via the contact piece or a contact area provided here. There is the possibility here of a clamping connection between wire 2, that is to say wire end 22 or wire beginning 21, and connector 4 in the contact area by clamping wire 2.

The inlet and / or outlet line 6 or the inlet or outlet area of the connector 4 can have various embodiments which depend on the ultimate use or the intended use of the coil 1 according to the invention.

The coil flange 11 feeds the beginning of the wire 21 or the end of the wire 22 through suitable grooves or recesses to the intended position on the holding element 3 and enables the wire 2 to be guided laterally on the holding element 3. In addition, the coil flange 11 also ensures that the beginning of the wire 21 is kept separate and wire end 22 takes place until appropriate Connectors 4 are arranged on the coil 1.

Claims (12)

1. Coil (1), for example as a magnetic coil in an electromagnet, consisting of a coil body (10), which supports a plurality of windings (20) of a conductive wire (2) and wherein the coil body (10) has at least one holding element (3) for mechanically securing a wire start end (21) and a wire end (22) of the windings (10) and at the wire start end (21) and wire end (22) has a first electric connector (41) and a second electric connector (42) for connecting to an electric supply and discharge line (6), wherein the connectors (41, 42) are designed as components separated by the holding element (3), wherein on the coil (1) or on a coil flange (11) a support (30) is provided which mounts at least one holding element (3), the support (30) or the coil flange (11) has a first recess which is spanned by the wire start end (21) of the wire (2), and a second recess which is spanned by the wire end (22) of the wire (2), and the first connector (41) is connected electroconductively to the wire (2) in the region of the first recess and the second connector (42) is connected electroconductively to the wire (2) in the region of the second recess, characterised in that the wire start end (21) and the wire end (22) are arranged parallel to one another in the region of the respective recess and the two recesses are arranged on opposite sides of the support or the coil flange such that the first recess opens to a first side and the second recess opens to a second side opposite the first side.
2. Coil (1) according to claim 1, characterised in that the holding element (3) secures the wire start end (21) and the wire end (22) respectively in locally spaced apart regions.
3. Coil (1) according to any of the preceding claims, characterised in that on the coil (1) two holding elements (3) are provided, one for the wire start end (21) and one holding element (3) for the wire end (22).
4. Coil (1) according to any of the preceding claims, characterised in that the holding element (3) is designed as a winding mandrel (31, 32), which is wrapped round at least partly by the wire end (22) or the wire start end (21).
5. Coil (1) according to any of the preceding claims, characterised in that the connectors (41, 42) are pushed onto the holding element (3) and the wire end (22) or the wire start end (21) is arranged between the respective connector (41, 42) and the holding element (3) or the respective connector (41, 42) is arranged between the holding element (3) and the wire end (22) or wire start end (21).
6. Coil (1) according to any of the preceding claims, characterised in that the connectors (41, 42) are adhered, welded or caulked onto the holding element (3) or the connectors (41, 42) are held by clamping on the holding element (3).
7. Coil (1) according to any of the preceding claims, characterised in that the support (30) is connected on one side to the coil (1) or the coil flange (11) and the support (30) on the side facing away from the coil (1) or the coil flange (11) supports at least one holding element (3).
8. Coil (1) according to any of the preceding claims, characterised in that on the support (30), the coil (1) or the coil body (10) at least one guide element (12) is provided for the wire (2), in particular for the wire start end (21) and/or for the wire end (22).
9. Coil (1) according to any of the preceding claims, characterised in that the coil body (10), the coil (1), the holding element (3) or the support (30) bearing the holding element (3) has an insertion slot (33), which can cooperate in particular in a mechanically securing manner with an insertion piece (43) of the connector (4, 41, 42) which is insertable into the insertion slot (33).
10. Method for the installation of a coil (1) according to any of the preceding claims, for example a magnetic coil for an electromagnet, wherein the coil (1) has a coil body (10), onto which a conductive wire (2) is wound with a plurality of windings (20) and wherein the wire start end (21) or the wire end (22) is secured to at least one holding element (3) and afterwards the coil (1) is completed by connectors (41, 42), in particular from a group of partly different connectors (41, 42), in that the connectors (41, 42) are connected conductively respectively in a contact region to the wire (2).
11. Method according to claim 10, wherein the connectors (41, 42) together with electrical connection are joined mechanically to the coil body (10), the coil (1), the holding element (3) or the support (30) bearing the holding element (3).
12. Method according to any of claims 10 or 11, wherein the completion of the coil (1) with connectors (4, 41, 42) is performed locally and/or temporally separately from a winding process of the coil (1), in particular wherein the wound coil (1) is incorporated before the completion.

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