Arrangement of wire windings in magnetisable flux conductor of stator of rotary electric machine designed as inner rotor

Abstract

The invention relates to a winding device (60) for arranging a wire winding (12) in a magnetizable flux conductor (10) of a stator of a rotary electric machine designed as an inner rotor, the invention relates to a winding device for a magnetizable flux conductor (10) having a receiving opening (14) for receiving a rotatably mounted rotor of a rotating electrical machine and a longitudinal slot (16) open on the opening side for arranging a wire winding (12) made of at least one winding wire (18), comprising:-a wire insertion device (20) which can be arranged at least partially in the receiving opening (14), and-a support unit (22) which supports the insertion of the winding wire (18) and which has at least one guide element which is designed to arrange the winding wire (18) in a predefined longitudinal slot (16) of the magnetisable flux conductor (10), the wire insertion device (20) having a slide (48) which can be moved back and forth in the axial direction and on which a wire guide sleeve (50) is arranged, the wire guide sleeve is designed to pivot between two predefinable pivot positions by means of a pivot drive (52).

Description

Technical Field

[0001] The invention relates to a winding device for arranging a wire winding in a magnetizable flux conductor of a stator of a rotating electric machine designed as an inner rotor, wherein the magnetizable flux conductor has a receiving opening for accommodating a rotatably mounted rotating part of the rotating electric machine and longitudinal slots open on the opening side for arranging the wire winding, wherein the wire winding has a coil made of at least one winding wire. The invention also relates to a method for arranging a wire winding in a magnetizable flux conductor of a stator of a rotating electric machine designed as an inner rotor, wherein the magnetizable flux conductor has a receiving opening for accommodating a rotatably mounted rotating part of the rotating electric machine and longitudinal slots open on the opening side for arranging the wire winding, wherein the wire winding has a coil made of at least one winding wire. Background Art

[0002] Universal electric machines, stators for universal electric machines, and methods and winding devices for universal electric machines are generally known in the prior art, that is, no separate document is required. In rotating electric machines, the armature is generally provided as a stator, which usually provides a substantially circular opening for accommodating the armature, which is designed as a rotor. A rotor is arranged in this opening in a rotatably mounted manner, wherein an air gap is formed between the rotor and the stator.

[0003] A rotating electrical machine is a device that converts electrical energy into mechanical energy, in particular kinetic energy (motor operation) and / or electrical energy (generator mode). The movement is usually a rotational movement performed by a rotating part. The stator is arranged non-rotatingly, unlike the rotating part, i.e. the rotational movement is a rotational movement of the rotating part relative to the stator. The stator and the rotating part are linked by means of a magnetic flux, whereby a force effect, i.e. a torque, is generated in motor mode, which drives the rotating part to rotate relative to the stator, and in generator mode the mechanical energy supplied to the rotating part is converted into electrical energy in a rotational manner. For this purpose, at least the stator and, if necessary, the rotating part have coils through which an electric current flows. In the stator or the rotating part, the winding can also be formed or supplemented by permanent magnets.

[0004] Common types of rotating electrical machines are, for example: DC machines to which DC voltage or DC current is applied during normal operation, such as shunt or series machines; AC machines to which AC voltage or AC current is applied, in particular multi-phase machines connected to a multi-phase, in particular three-phase, AC power grid, i.e., for example asynchronous machines, synchronous machines, cage synchronous machines, etc.

[0005] The stator usually has at least a magnetizable flux conductor. The magnetizable flux conductor is used to at least partially guide the flux during normal operation in order to achieve or at least support the desired machine function. The magnetizable flux conductor can, for example, have a lamination stack, which in turn is composed of individual ferromagnetic or magnetizable laminations that are electrically insulated from each other. Depending on the purpose of use, the laminations can also be called generator laminations, motor laminations, transformer laminations, etc. Such laminations are implemented in standards, such as EN10106, EN10107, etc. The lamination stack is embedded in a slot, which is usually constructed as a longitudinal slot and can be basically constructed to be parallel to the longitudinal axis or rotation axis of the rotating part or to form a certain angle with the axis. The winding, in particular the current-guiding coil of the stator winding, is arranged in the longitudinal slot, and the winding provides the magnetic flux. Therefore, the winding of the stator is usually constructed in an integrated manner into the lamination stack.

[0006] The stator receives the reaction forces associated with the torque of the rotating part and is supported by a support so as to be arranged non-rotatingly. The support can be formed by the base or the same support. The lamination stack thus represents a structured and magnetizable body made of ferromagnetic material, i.e. a magnetizable flux conductor. The task of the magnetizable flux conductor is to form a magnetic flux flow together with the winding through which the current flows. However, the magnetizable flux conductor can also have a body consisting of a magnetizable ferrite material or the like.

[0007] The production of stator windings for rotating electrical machines generally involves arranging the windings, i.e. the coils of the windings or the stator windings, in through-openings provided for this purpose, which are generally designed as longitudinal slots. In the case of rotating electrical machines in the low-power and medium-power range, windings are generally used which are formed from one or more winding wires, in particular round wires, which, in contrast to strip windings, can be drawn into corresponding longitudinal slots. Thus, for example, WO 2020 / 058048 A1 discloses drawing the windings into a stator lamination stack.

[0008] For example, it is known that, in particular when the coils of the winding are made of a single electrical conductor in the form of a winding wire, in particular a round wire or the like, the coils of the winding are wound onto a template and the winding or the coils are subsequently introduced into the longitudinal slots. In the state in which the winding is arranged in a magnetizable flux conductor or in a stator, the winding has a winding head at the axial end of the stator or the magnetizable flux conductor, respectively. In the aforementioned method, a large part of the winding and also a section associated with one of the two winding heads are usually not controlled outside the template. When the coils are pulled into the corresponding longitudinal slots, the preset arrangement of the individual coils cannot be ensured. As a result, a crossing of the individual coils can occur in the longitudinal slots, resulting in a loss of filling degree in the corresponding longitudinal slots. As a result, for example, in normal operation, a voltage that deviates from the corresponding coil may occur, for example, relative to the adjacently arranged coils. In addition, there is the risk that the adhesive insulation is weakened or damaged.

[0009] Furthermore, WO 2020 / 058048 A1 proposes that a so-called laid winding with a defined arrangement of individual coils can be pulled into a longitudinal slot. For this purpose, it includes but is not limited to using a special winding tool with a tool slot, which is constructed at the outer circumference of the tool core and in which the individual coils of the winding are arranged.

[0010] Even though the prior art has been largely proven, it still has disadvantages. On the one hand, the methods of the prior art have proven to be complex and expensive, and on the other hand, in particular when using methods using templates, there is the problem that the coil length of the individual coils must be oversized so that during the subsequent pulling-in process, the coil that is pulled in first can be pulled completely into the longitudinal slot due to the coil length. However, this requires an excess in the coil length of the individual coils, which not only leads to electrical losses, but also to a design that is correspondingly large to one of the winding heads. In addition, this can also have a negative impact on the stability of the winding head during normal operation, since the individual windings are subjected to their own forces.

[0011] Due to the ever-increasing demands on the efficiency of electric machines and the changes in the electromagnetic design that are relevant to the requirements, such as slot filling, width of the slot opening, etc., the wide range of winding wire pulling methods are reaching their technical limits. In the past, the production of electric machines has increasingly turned to time- and cost-intensive manual winding. In addition, mechanical winding methods have been used so far, such as needle winding for small and medium-sized machines or direct winding with the help of robots for large electric machines. Such winding methods have particular disadvantages, such as large facility investments, complex control due to the superposition of multiple movement directions (which can lead to a reduction in winding speed) and the need for additional components, such as end discs for storing and shaping the winding heads. Summary of the invention

[0012] The basic object of the invention is to improve this method, thereby improving the production of windings and to propose an improved winding device.

[0013] According to the invention, a device and a method according to the independent claims are proposed as a solution.

[0014] Advantageous developments are revealed by the features of the dependent claims.

[0015] Regarding general equipment, according to the present invention, a winding equipment for arranging a wire winding in a magnetizable flux conductor of a stator of a rotating electric machine constructed as an inner rotating part is particularly proposed, wherein the magnetizable flux conductor has a receiving opening for accommodating a rotatably mounted rotating part of the rotating electric machine and a longitudinal slot open on the opening side for arranging the wire winding, wherein the wire winding has a coil made of at least one winding wire, and the winding equipment has: a wire insertion device that can be at least partially arranged in the receiving opening, and a supporting unit that supports the insertion of the winding wire and has at least one guide element, the guide element being constructed for arranging one or more winding wires in predetermined longitudinal slots of the magnetizable flux conductor.

[0016] With regard to a general method, the present invention particularly proposes a method for arranging a wire winding in a magnetizable flux conductor of a stator of a rotating electric machine configured as an inner rotating part, wherein the magnetizable flux conductor has a receiving opening for accommodating a rotatably mounted rotating part of the rotating electric machine and longitudinal slots open on the opening side for arranging the wire winding, wherein the wire winding has a coil made of at least one winding wire, wherein a wire insertion device is at least partially arranged in the receiving opening and supports the insertion of the winding wire by means of a supporting unit having at least one guide element, wherein the guide element arranges one or more winding wires in predetermined longitudinal slots of the magnetizable flux conductor.

[0017] The invention is based in particular on the idea that automated winding can be improved at least in part by a suitable wire insertion device, which can preferably be arranged in the receiving opening, and by a support unit, which can improve the introduction of one or more winding wires of a wire winding into the longitudinal slots of a magnetizable flux conductor, for example by using, for example, a wire guide unit, a spring-prestressed component, an additional drive unit and / or the like. As a result, not only the expenditure for the stator winding or the winding of a stator, in particular, can be reduced, but also the quality of the winding can be improved. With the aid of the winding device according to the invention or the method according to the invention, the influence on the arrangement of the respective coils of the winding in the slots can be reduced. In particular, the positioning accuracy of the respective coils in the slots can be significantly improved. In particular, the filling of the slots can thereby be improved, so that the filling factor can be increased.

[0018] At the same time, a simple adaptation to different slot widths in the circumferential direction can be achieved, so that the winding device and method of the present invention can be adapted to different stators or magnetizable flux conductors. This can also reduce the disadvantages of large plant investments and the need for additional additional components.

[0019] Therefore, by means of a winding device according to the invention for winding a wire or a method according to the invention, a wire winding (e.g. a coil) can be positioned in longitudinal slots having very different stator diameters, regardless of the adjustable coil width, i.e. the preset spacing between two longitudinal slots in the circumferential direction.

[0020] By means of a winding device according to the invention for guiding one or more winding wires or a method according to the invention, very different winding systems can be produced in the lamination stack of a stator, such as single-layer windings, two-layer windings, wave windings, toroidal windings, integer-hole windings, fractional-hole windings, etc.

[0021] The winding device according to the invention for guiding the winding wire or the method according to the invention can also be used for winding systems of segmented motors, in which the flux conductor is constructed in segments as viewed in the circumferential direction. In this case, the individual segments are first wound and, if necessary, impregnated and then assembled to form a stator that is closed in the circumferential direction.

[0022] The wire insertion device can be designed to be arranged preferably concentrically with respect to the longitudinal axis of the magnetizable flux conductor. The wire insertion device is preferably designed and driven so that it can arrange the corresponding coils of a winding, which can have a plurality of coils consisting of at least one winding wire, in the center of the longitudinal slots assigned to the magnetizable flux conductor.

[0023] The wire insertion device is also preferably designed to arrange a plurality of coils in longitudinal slots originating from a single winding wire. Provision can be made for the wire insertion device to provide two or more winding wires simultaneously, in particular in parallel, for arrangement in the longitudinal slots.

[0024] Furthermore, it can be provided that the wire insertion device is designed to arrange a plurality of electrically isolated partial windings of a coil in the longitudinal slots. This is advantageous, for example, if the rotating electrical machine is an electrical machine for operation with a multi-phase alternating voltage. The wire insertion device can be designed to arrange a plurality of coils of a winding wire in the same longitudinal slot.

[0025] The wire insertion device preferably cooperates with a support unit, which supports the insertion of the winding wire. For this purpose, the support unit has at least one guiding element, which is configured to arrange the winding wire in a predetermined longitudinal groove of the magnetizable flux conductor by targeted guidance. This can be achieved in the following way, that is, the wire insertion device arranges the winding wire at the guiding element, wherein the guiding element acts on the wire due to a tensile force or a force such as gravity to support or realize or promote the arrangement of the winding wire in the corresponding longitudinal groove. For this purpose, the support unit can have a body element, which, for example, provides an inclined surface, a pin or a combination thereof, etc. that enables the winding wire to slide into the corresponding longitudinal groove due to its own orientation and position. For this purpose, the support unit can be arranged in the receiving opening. However, the support unit does not need to extend over the entire axial range of the magnetizable flux conductor. However, it is preferably proposed that the support unit at least partially extends from the receiving opening at one or both axial ends of the magnetizable flux conductor. The extended section of the support unit can be configured in a suitable manner to support or realize the formation of the winding head.

[0026] The support unit can be detachably arranged at the inner surface of the receiving opening of the magnetizable flux conductor. Preferably, the support unit is arranged in a circumferential direction on the end face of the magnetizable flux conductor, in particular the stator, in a manner matching the edge of the corresponding longitudinal slot. The support unit can be designed as a one-piece or multi-piece. However, it can also be provided that the support unit is arranged completely outside the receiving opening of the magnetizable flux conductor, for example, in the area of ​​the body end face side configured at the axial end of the magnetizable flux conductor. Corresponding guide elements can also be provided here. The guide elements can be designed to be adaptive with respect to the geometry of the magnetizable flux conductor and the longitudinal slots provided thereby, and for example provide corresponding tilting pieces that support or enable the arrangement of the winding wire in the corresponding longitudinal slots.

[0027] When a predetermined number of coils of winding wire are arranged in slots or slot pairs, it can be provided that the magnetizable flux conductor is rotated relative to the winding device in order to be able to wind a further longitudinal slot or a further pair of longitudinal slots accordingly. This can continue continuously until the winding of the magnetizable flux conductor is completely produced.

[0028] By using a support unit, for example, the direction of movement of the winding wire during guidance can be reduced or shifted. The use of a support unit can lead to a reduction in movement in one direction during the actual winding process. This makes it possible to achieve a simplified and cost-saving variant of the winding device. In addition, the winding process itself can be accelerated by reducing the superimposed movement. In addition, a high degree of flexibility can be achieved in a simple manner with regard to the variation of the winding and the magnetizable flux conductor. Low programming effort has also proven to be advantageous when adapting the winding device to the magnetizable flux conductor to be wound. Here, for example, in the stator of an electric motor, the following parameters can be considered and adjusted simply, individually or (partially) in total, including but not limited to: axial length, outer diameter of the stator, diameter of the stator bore, number of slots, slot depth, slot spacing of the longitudinal slots for the coil.

[0029] Furthermore, this also makes it possible to reduce the number of components on the product.

[0030] The wire insertion device can be held at mutually opposite ends of the magnetizable flux conductor in order to carry out the winding process or winding procedure. However, it has proven to be particularly advantageous if the wire insertion device is only held at one end side. In this embodiment, the magnetizable flux conductor can be easily installed in the winding device or removed from the winding device once the winding is completed.

[0031] The longitudinal slots forming the slot pairs can be formed in the circumferential direction via a predetermined spacing between one another. The support unit is preferably adapted for this purpose. Likewise, the wire insertion device can be adjusted accordingly so that the coils of the winding can be arranged in the slot pairs of the longitudinal slots. For example, the longitudinal slots of the slot pairs can be spaced apart from one another by a rotation angle of about 50° in the circumferential direction. However, this can also be varied as required, for example depending on the planned winding system of the stator.

[0032] The winding device according to the invention can therefore be used in a variety of ways, in particular for forming various windings.

[0033] It is also proposed that the support unit has a wire guide unit, which can be arranged in the receiving opening at the edge of the longitudinal slot, and the wire guide unit provides an inclined surface as a guide element, and the inclined surface is designed to slide the wire of the coil arranged on the inclined surface by the wire insertion device into the longitudinal slot. As a result, the introduction of the winding wire into the longitudinal slot can be achieved in a simple manner without any further intervention. The inclined surface can be configured, for example, to correspond to the entire axial length of the longitudinal slot. Preferably, the inclined surface ends at the edge of the opening of the longitudinal slot. As a result, the winding wire can slide through the opening into the longitudinal slot without hindrance. For example, the sliding in can be supported or caused by a tensile force acting on the winding wire. However, it can also be proposed that the winding wire slides into the longitudinal slot due to its weight. In this case, the longitudinal slot in which the winding wire is to be arranged is preferably arranged in the lower area of ​​the magnetizable flux conductor.

[0034] It is further proposed that the wire guide unit has two mutually opposed inclined surfaces which are spaced apart in the circumferential direction so that the winding wire wound around the wire guide unit forms a coil of the wire winding and slides into the corresponding longitudinal slots of the longitudinal slots by means of the mutually opposed inclined surfaces. For this purpose, the inclined surfaces are preferably configured so that the inclined surfaces are inclined relative to each other when they abut against the corresponding slot edges so that the tensile forces acting on the winding wire enable sliding into the two longitudinal slots. The wire guide unit thus determines the arrangement of the coils in the longitudinal slots by its positioning relative to the longitudinal slots forming the slot pair. Once the winding has been produced from a plurality of coils in this way, the wire guide unit and / or the magnetizable flux conductor can be rotated relative to each other so that the winding can be continued by means of another slot pair. A corresponding further coil can then be produced according to the above-described method.

[0035] The mutually opposing inclined surfaces of the wire guide unit have, for example, an inclined position which can be designed to be substantially constant in the axial direction. Preferably, the spacing of the mutually opposing inclined surfaces in the region of the slot edge is smaller than the spacing radially away from them in the direction of the longitudinal axis. This can support the corresponding guidance of the winding wire into the longitudinal slot.

[0036] It is further proposed that the wire guide unit has a corresponding end region at its mutually opposite axial ends, which protrudes beyond the body end face side formed at the axial body end of the magnetizable flux conductor and forms a corresponding radial tilting piece, which with one end abuts against the body end face side. Therefore, the end abutting against the body end face side is radially outside the area of ​​the receiving opening. This can support the formation of the winding head, so that a separate tool for forming the winding head can be saved or the cost for this can be reduced. The tilting piece can also be formed by an inclined surface. However, the inclined surface can also be formed by one or more radially outwardly protruding pins, which are formed by the corresponding axial ends of the wire guide unit at least partially inclined outwardly toward the body end face side. Therefore, a corresponding movement can be achieved by gravity or a pulling force acting on the winding wire, so that the winding wire is pulled radially outward in the area of ​​the front side of the body. The pin is preferably movable. In particular, the pin can be used as a guide device for at least one winding wire. The pin can be driven by a pin drive unit, for example, so that the position and / or orientation can be adjusted. Particularly advantageously, the pin can be pulled back after the coil of the winding has been completed. This makes it possible to release the winding head in order to rotate the stator or the magnetizable flux conductor in order to carry out winding with another coil of the winding.

[0037] It is further proposed that a movably, in particular pivotably supported wire guide element is arranged in the region of the tilting element, the wire guide element being designed to be moved, in particular pivoted, between an idle position and a support position by means of a drive unit. Preferably, the wire guide element can be moved or pivoted radially outwards, so that each time the winding wire is arranged on the tilting element, the wire guide element is actuated in order to move or deform the winding wire to the desired position for the winding head. In the idle position, it can be proposed that the wire guide element substantially has no effect on the winding wire. This makes it possible, for example, to support a winding process by means of a wire insertion device or to achieve a non-interference in the process. The support position is then preferably a position, in particular a pivoted position, into which the winding wire is moved into the desired position. This is particularly advantageous when the winding wire does not automatically assume the desired position due to its mechanical properties.

[0038] It is further proposed that the winding device has a forming tool that can be arranged in the area of ​​the winding head to be formed, and the forming tool can be moved axially parallel to the longitudinal axis by means of a tool drive unit. The forming tool is preferably arranged axially away from the wire guide unit to arrange the winding wire on the inclined piece. As a result, the arrangement of the winding wire can be carried out undisturbed over a large range by the wire insertion device. The forming tool preferably has a shape that corresponds to the shape of the winding head to be formed. By actuating the tool drive unit that is mechanically connected to the forming tool, the forming tool can be moved axially parallel to the longitudinal axis, so that the forming tool can mechanically act on the winding end that forms the winding head. As a result, the winding end can be deformed to form the winding head. This is preferably done when all the winding ends have been arranged in the area of ​​the body end face side. However, it can also be optionally proposed to actuate the forming tool accordingly each time a separate coil end is arranged.

[0039] According to another improved solution, it is proposed that the wire insertion device has a slider that can be reciprocated in the axial direction, and a wire guide sleeve is arranged at the slider, and the wire guide sleeve is configured to pivot between two preset pivot positions by means of a pivot drive. It can be achieved in a simple way that the wire is introduced into a preset slot, in particular a preset longitudinal slot in a slot pair, by means of the wire insertion device. It can be proposed that the winding wire is introduced into a first longitudinal slot in the longitudinal slot when moving forward in the first pivot position, and after reaching the axial end of the longitudinal slot, the wire guide sleeve is pivoted to a preset second longitudinal slot in the longitudinal slot, more precisely, pivoted in a circumferential direction around the longitudinal axis, so that the winding wire is inserted into another longitudinal slot in the longitudinal slot when the slider moves back. This process can be repeated until the desired number of coils is arranged in the center of the longitudinal slot pair. Then, the magnetizable flux conductor can be rotated accordingly so that another pair of longitudinal slots can be wound accordingly.

[0040] The wire guiding sleeve has an exchangeable insert in order to be able to process several winding wires in parallel.

[0041] Furthermore, it can be provided that not only round wires with a predeterminable cross section are processed in the magnetizable flux conductor by means of the device, but also different cross sections and / or cross-sectional shapes of the winding wire are used.

[0042] The electric machine produced by the winding device according to the invention and / or the method according to the invention therefore has a relatively short axial winding head and a high winding filling degree of the winding (e.g. round wire winding) in the slots of the electric machine. Thus, similar electric machines used as drives for superchargers, pumps, compressors, fans, conveyor belts, etc., for example in industrial environments, the food industry, the medical field and (road or rail) vehicles, have a higher efficiency.

[0043] The advantages and effects described for the method according to the invention naturally also apply to the winding device according to the invention, and vice versa. In this respect, device features can also be expressed as method features, and vice versa.

[0044] The embodiments explained below are preferred embodiments of the present invention. The features and feature combinations previously described in the specification and the features and feature combinations mentioned in the following description of the embodiments and / or shown separately in the drawings can be used not only in the combinations described respectively, but also in different combinations. Therefore, the embodiments that are not clearly shown and explained in the drawings but are derived and can be produced by the separate feature combinations consisting of the explained embodiments are also included in the present invention or are considered to be disclosed. The features, functions and / or effects shown in the embodiments can represent the features, functions and / or effects of the present invention that can be considered independently of each other, and the features, functions and / or effects can also improve the present invention independently of each other. Therefore, the embodiments should also include combinations that are different from the combinations of the explained embodiments. In addition, the described embodiments can also be supplemented by other features, functions and / or effects that have been described in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In the drawings, the same reference numerals denote the same features and functions.

[0046] The accompanying drawings show:

[0047] Figure 1 A perspective schematic diagram showing a first embodiment of a winding device;

[0048] Figure 2 Show according to Figure 1 A partial three-dimensional schematic diagram of a first embodiment of a winding device;

[0049] Figure 3 A second embodiment of the winding device is shown similar to Figure 2 A three-dimensional schematic diagram of

[0050] Figure 4 A schematic perspective view of a third embodiment of a winding device is shown. DETAILED DESCRIPTION

[0051] Figure 1 The present invention shows a schematic perspective view of a winding device 60 for arranging a wire winding 12 in a laminated core 10 of a stator of a rotating electrical machine designed as an inner rotor. The stator and other elements of the rotating electrical machine that are being viewed are not shown in the figure.

[0052] The laminated core 10 is currently used as a magnetizable flux conductor. The laminated core 10 currently has a substantially circular receiving opening 14 for receiving a rotatably supported rotating part of a rotating electrical machine. The open side of the laminated core 10 opposite the receiving opening 14 has open longitudinal grooves 16 for arranging the winding 12. The wire winding 12 is currently formed by a coil consisting of a winding wire 18. The receiving opening 14 has a longitudinal axis 38.

[0053] The laminated core 10 has an axial body end which is provided with a body end face 32 . The longitudinal slots 16 are open at the body end face 32 , so that the winding wires 18 can protrude axially from the longitudinal slots 16 .

[0054] The winding device 60 has a wire insertion device 20 which can be arranged in the receiving opening 14. The wire insertion device 20 has a slide 48 which can be moved back and forth in the axial direction. For this purpose, a corresponding slide drive unit 54 is provided which drives the slide 48 mechanically accordingly.

[0055] The wire guide sleeve 50 is arranged at the slider 48 and is configured to pivot between two pre-set pivot positions by means of a pivot drive 52. For this purpose, the pivot drive 52 is also mechanically connected to the slider 48. The tool drive unit 46 and the pivot drive 52 can be formed in a common structural unit in one piece. However, they are preferably configured as separate structural units. By means of the pivot drive 52, the pivot position is switched at the axial end position of the reciprocating slider 48. It is not provided here that the switching of the pivot position is performed during the reciprocating movement of the slider 48. Here, the winding wire 18 is passed through the wire guide sleeve 50, so that the arrangement of the winding wire 18 can be caused by means of the wire guide sleeve 50.

[0056] At present, the slide 48 is movably held at the holding shaft 56. The holding shaft 56 is held coaxially with the longitudinal axis 38 at the mutually opposite ends of the corresponding holding unit 58. In an alternative design, it can also be proposed that only a single holding unit 58 is present, so that the laminated stack 10 can be connected to the winding device 60 in a simple manner without installing the holding unit 58. At present, the longitudinal axis of the holding unit 58 is arranged coaxially with the longitudinal axis 38. However, the holding shaft 56 does not need to be arranged coaxially. The holding shaft can only be simply arranged parallel to the longitudinal axis.

[0057] Not shown in the drawings is a wire supply device which in a suitable manner delivers and supplies the winding wire 18 to the winding device 60. The winding wire 18 is guided through the wire guide sleeve 50 and supplied by the wire guide sleeve in a suitable manner as will be described below to be arranged in the respective longitudinal grooves 16.

[0058] like Figure 1 and Figure 2 As shown in , the winding device 60 also has a support unit 22, which supports the insertion of the winding wire 18 and has a guide element for this purpose, which is configured to arrange the winding wire 18 in the predetermined longitudinal groove 16 of the laminated core 10. For this purpose, the support unit 22 has a wire guide unit 24 in the current design, which can be arranged in the receiving opening 14 at the edge of the predetermined longitudinal groove 16. The wire guide unit 24 provides an inclined surface 26 used as a guide element. The inclined surface 26 is configured to make the winding wire 18 of the coil of the winding 12 arranged on the inclined surface 26 by the wire insertion device 20 slide into the longitudinal groove 16. For this purpose, the radial outer end of the inclined surface 26 is configured at the edge of the corresponding longitudinal groove 16. At present, the inclined surface 26 is configured in the axial direction corresponding to the extension of the laminated core 10. As a result, a corresponding guiding effect is achieved over the entire axial length of the longitudinal groove 16.

[0059] In the current design, it is proposed that the wire guide unit 24 has two inclined surfaces 26 facing each other. Figure 1 Only one of the two inclined surfaces is visible in FIG. The second, mutually opposite inclined surface also extends in the axial direction like the visible inclined surface 26. The invisible inclined surface 26 is also arranged accordingly relative to the longitudinal slot 16 so that it supports or enables the winding wire 18 to slide into the longitudinal slot 16. The two inclined surfaces 26 are spaced apart in the circumferential direction so that the winding wire 18 wound around the wire guide unit 24 forms a coil of the wire winding 12 and slides into the corresponding longitudinal slot of the longitudinal slot 16 by means of the mutually opposite inclined surfaces 26. As a result, a corresponding coil can be formed in the corresponding longitudinal slot 16.

[0060] For this purpose, the wire insertion device 20 is operated accordingly so that the corresponding coils of the coils of the winding 12 are arranged one after another on the wire guide unit 24 and in the corresponding longitudinal slots 16. In the current design, the two longitudinal slots 16 form a slot pair, which is used to form the corresponding coils of the winding 12. At present, the longitudinal slots are spaced apart from each other at an angle of approximately 50° in the circumferential direction. Depending on the design of the rotating electrical machine and the winding 12, this can also be selected differently. The longitudinal slots 16 arranged between the slot pairs are closed or covered by the wire guide unit 24. As a result, a reliable winding function of the winding device 60 can be achieved.

[0061] from Figure 1 and Figure 2 It can also be seen that the wire guide unit 24 is designed to form two mutually opposite end regions 28 when arranged in the receiving opening 14, which end regions are used to form a winding head. In the end region 28, the winding wire 18 is transferred from the corresponding first longitudinal groove 16 to the corresponding second longitudinal groove 16 in the region of the body end face 32. In this way, a corresponding winding head (not shown) is formed, which is used to subsequently form a corresponding winding head.

[0062] The end region 30 protrudes outward from the receiving opening 14 beyond the body end face side 32 and forms a corresponding radially extending bevel 34, which rests with one end against the body end face side 32. The bevel 34 thus extends radially outward from the wire guide unit 24. The winding ends of the winding wires 18 are guided radially outward by the bevel 34, so that the bevel can form the winding heads and at the same time keep the passage to the receiving opening 14 free. For this purpose, the wire guide unit 24 has corresponding end regions 30 at its mutually opposite axial ends.

[0063] In the present case, the tilting element 34 is at least partially supplemented by a pin-shaped extension 64. The extension serves to support the arrangement of the winding wire 18 in the corresponding longitudinal groove 16 and at the same time to move the winding wire 18 radially outward outside the laminated core 10. To provide support, it can be provided that the wire guide sleeve 50 is designed to exert a tensile force on the winding wire 18 so that a corresponding movement of the winding wire 18 at the tilting element 34 can be supported ( Figure 2 ).

[0064] Figure 3 A second embodiment of the winding device 60 is shown similar to Figure 2 Schematic diagram of the winding equipment based on Figure 1 and Figure 2 This is the reason for the supplementary reference to the related embodiments. Only the differences are explained below.

[0065] from Figure 3It can be seen that in this embodiment, the wire guide unit 24 has a movably mounted wire guide element 36 in the region of the tilting element 34, which is designed to be moved between a rest position and a support position by means of a drive unit 40. Figure 3 , the idle position is shown, in which the wire guide element 36 does not substantially influence the guidance of the winding wire 18. The drive unit 40 can be designed, for example, as a lifting magnet. However, alternatively, a hydraulic or pneumatic control device or a ball screw drive or the like can also be provided.

[0066] In the present case, the wire guide element 36 can be moved radially downwards. For this purpose, the wire guide element is driven accordingly by means of the drive unit 40 so that it can assume the supporting position. In the supporting position, the wire guide element 36 is moved radially downwards and can thus act on the winding wire 18 in the area of ​​the coil ends and thus support the formation of the winding head, as already explained above. The actuation of the drive unit 40 can be set individually for each individual coil of the winding wire 18. However, it can also be provided that the drive unit 40 is not actuated until a predetermined number of coils have been arranged, so that the coil ends of the winding wire 18 can be moved together into the desired position.

[0067] Figure 4 A third embodiment of a winding device 62 is shown, which is based in part on the Figures 1 to 3 This is the reason for supplementary reference to the relevant design solutions. Figure 4 It can be seen that the winding device 62 is used to process not only a single winding wire 18 in one step, but also two or more winding wires 18 at the same time, which are currently processed in parallel. For this purpose, the wire guide sleeve 50 is correspondingly constructed so that it can guide two winding wires 18 together.

[0068] For this purpose, the wire guiding sleeve 50 has an exchangeable insert in order to be able to process a plurality of winding wires 18 in parallel.

[0069] Furthermore, it is thereby possible to process not only round wires with a predeterminable cross section by means of the device in the laminated core 10 of the stator, but also to use winding wires 18 with different cross sections and / or cross-sectional shapes.

[0070] A further difference from the previous embodiment is that the support unit 22 does not have a wire guide unit 24 here, but instead has two pins 42 arranged at a distance from each other and inclined relative to the longitudinal axis 38 on the respective body end sides 32. The pins are here and usually connected to a pin drive unit, which allows the pins 42 to be pulled back from the winding wire 18 after the corresponding coils have been produced. This makes it possible to achieve that the stator or the laminated core 10 can be rotated to form the pair of longitudinal slots 16 to be produced below.

[0071] The pins 42 are designed to be adjustable in their inclination and position, so that they can be easily adapted to various laminated cores 10. The pins 42 serve to guide the winding wires 18 from the respective first longitudinal grooves 16 to the second longitudinal grooves 16 respectively formed at a distance therefrom in the region of the axial body end face 32. At the same time, the inclined position relative to the longitudinal axis 38 enables the winding wires 18 to be moved radially outwards in the region of the pins 42 due to the tensile forces when the winding wires 18 are arranged, so that the winding heads can then be formed.

[0072] The wire guide sleeve 50 is therefore designed here so that the winding wire 18 can be introduced directly from the wire guide sleeve into the longitudinal groove 16. For this purpose, the corresponding pivot position of the wire guide sleeve 50 is controlled accordingly and precisely. The basic principle of the drive of the slide 48 and the wire guide sleeve 50 corresponds to the principle as already explained previously, which is why reference is made to the embodiments associated therewith.

[0073] In this embodiment, it is also proposed that the winding device 62 has a forming tool 44 that can be arranged in the area of ​​the winding head to be formed. The forming tool 44 can be moved axially parallel to the longitudinal axis 38 and can be driven by means of a tool drive unit 46. The forming tool 44 is used to support the winding wire 18 when moving radially outward in the area of ​​the body end face 32. In this way, the formation of the winding head can be realized or at least supported in a simple manner. Here, it can of course also be proposed that the forming tool 44 is only activated when the corresponding coil of the winding 12 has been wound. However, it can also be proposed that the forming tool is already activated after the corresponding coil has been manufactured.

[0074] In the figures, the laminated core 10 is shown in detail. However, it is clear to a person skilled in the art that the laminated core 10 is designed to be closed in the circumferential direction. The sectional view serves only to explain the invention.

[0075] The examples are only used to explain the present invention and are not intended to limit the present invention.

Claims

1. A winding device (60, 62) for arranging a wire winding (12) in a magnetizable flux conductor (10) of a stator of a rotating electrical machine designed as an inner rotor, wherein: The magnetizable flux conductor (10) has a receiving opening (14) for receiving a rotatably mounted rotating part of the rotating electrical machine and a longitudinal slot (16) open on the opening side for arranging the wire winding (12), wherein the wire winding (12) has a coil made of at least one winding wire (18), the winding device having: - a wire insertion device (20) which can be arranged at least partially in said receiving opening (14), and a support unit (22) which supports the insertion of the winding wire (18) and has at least one guide element which is designed to arrange the winding wire (18) in a predetermined longitudinal groove (16) of the magnetizable flux conductor (10), The wire insertion device (20) has a slide block (48) which can be reciprocated in the axial direction, on which a wire guide sleeve (50) is arranged, and the wire guide sleeve is designed to be pivoted between two pre-set pivot positions by means of a pivot drive (52).

2. The winding device according to claim 1, characterized in that The support unit (22) has a wire guide unit (24) which can be arranged in the receiving opening (14) at the edge of the longitudinal groove (16), and the wire guide unit provides an inclined surface (26) as a guide element, the inclined surface being configured to slide a winding wire (18) of a coil arranged on the inclined surface (26) by the wire insertion device (20) into the longitudinal groove (16).

3. The winding device according to claim 2, characterized in that The wire guide unit (24) has two mutually opposed inclined surfaces (26) which are spaced apart from each other in the circumferential direction so that a winding wire (18) wound around the wire guide unit (24) forms a coil of the wire winding (12) and the winding wire slides into the corresponding longitudinal groove (16) by means of the mutually opposed inclined surfaces (26).

4. The winding device according to claim 2 or 3, characterized in that: The wire guide unit (24) is designed to have at least one end region (28) for forming a winding head when arranged in the receiving opening (14).

5. The winding device according to claim 4, characterized in that The wire guide unit (24) has respective end regions (30) at mutually opposite axial ends of the wire guide unit, which project beyond a body end face (32) formed at an axial body end of the magnetizable flux conductor (10) and form respective radially inclined pieces (34) which abut with one end against the body end face (32).

6. The winding device according to claim 5, characterized in that A movably mounted wire guide element (36) is arranged in the region of the tilting element (34) and is designed to be moved between a rest position and a support position by means of a drive unit (40).

7. A winding device according to any one of the preceding claims, characterised in that The support unit (22) has two pins (42) on at least one of the body end faces (32), which are arranged at a distance from each other and are inclined relative to the longitudinal axis (38), wherein the pins (42) are designed to extend radially from the outside to the inside relative to the magnetizable flux conductor (10) at least into the region of the longitudinal groove (16) in order to support the formation of the winding head, wherein the pins (42) are preferably movable.

8. A winding device according to any one of the preceding claims, characterised in that A forming tool (44) is provided which can be arranged in the region of the winding head to be formed and which can be moved axially parallel to the longitudinal axis (38) by means of a tool drive unit (46).

9. A winding device according to any one of the preceding claims, characterised in that The wire guide sleeve (50) has an exchangeable insert in order to be able to process a number of winding wires (18) and / or cross sections of the winding wires (18) which can be processed in parallel and also to process the cross-sectional shape of the winding wires (18).

10. A method for arranging a wire winding (12) in a magnetizable flux conductor (10) of a stator of a rotating electrical machine designed as an inner rotor, wherein: The magnetizable flux conductor (10) has a receiving opening (14) for receiving a rotatably mounted rotating part of the rotating electrical machine and a longitudinal slot (16) open on the opening side for arranging the wire winding (12), wherein the wire winding (12) has a coil made of at least one winding wire (18), wherein: - a wire insertion device (20) is at least partially arranged in said receiving opening (14), and - assisting the insertion of the winding wire (18) by means of a support unit (22), the support unit having at least one guide element, wherein the guide element arranges the winding wire (18) in a predetermined longitudinal groove (16) of the magnetizable flux conductor (10), The wire insertion device (20) has a slider (48) that can move back and forth in the axial direction, on which a wire guide sleeve (50) is arranged, and the wire guide sleeve is configured to pivot between two pre-set pivot positions by means of a pivot drive (52) so as to position the coil in the corresponding groove by the pivoting.

11. Method for arranging a wire winding (12) according to claim 10, characterized in that The winding wire (18) is positioned under tension.

12. An electric machine produced by a winding apparatus according to claims 1 to 9 and / or a method according to claim 10.

13. Use of an electric machine according to claim 12 as a drive for boosters, pumps, compressors, fans or the like in industrial environments, the food industry, the medical field or the like.

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