Modular coupling unit

Abstract

The invention relates to a coupling unit for a three-phase electric machine having an excitation coil with an input line and an output line. The coupling unit comprises an electrically non-conductive coupling ring having a ring axis and three retaining elements which each imitate a ring shape and which each have at least one receptacle which is preferably open at least on one side or can be opened at least on one side, the coupling ring comprises three coupling wires which are each adapted to one of the annular shapes of the three holding assemblies and which are each inserted into the at least one associated receptacle. The three connection lines are arranged on different connection planes as viewed in the direction of the ring axis and can be electrically connected to an input line of an excitation coil that can be associated with each of the three phases. The holding assembly is configured as plug / latch modules which can be stacked at least in a specific order and which can be connected to each other. The invention also relates to a corresponding electric machine and to the use of at least two holding assemblies for producing the coupling unit.

Description

Technical Field

[0001] The invention relates to a connection unit for a three-phase electric machine having at least six excitation coils, each having an input terminal and each having an output terminal. Background Art

[0002] In an electric motor, the field coil must be electrically connected. To this end, the winding ends at the input and output ends of the field coil must be electrically contacted accordingly. There are many different implementations for this in the prior art. For example, the input line ends and the output line ends are individually guided to contact units respectively assigned to the connection phases (Anschlussphase) arranged at the circumference of the stator assembly. The input line is alternately connected to the three phases. Wiring is often carried out using a unit (wiring ring) that enables simple contact with an external plug or a control unit. Therefore, the unit contains all the necessary conductors and contact elements and is arranged on the end side of the stator. For this, in a star connection (Sternschaltung), all output lines are connected to each other. Other solutions use, for example, printed circuit boards, assembly units with stamped conductor tracks, overmolded units with conductor tracks, traditional cable arrangements, etc.

[0003] In the process of electrification in automotive technology, efforts are being made to find universally applicable solutions, especially for cost reasons. Summary of the invention

[0004] Starting from this, the invention is based on the object of improving the coupling unit mentioned in the introduction with regard to its structure and its costs in such a way that improved series production is possible.

[0005] According to the invention, this object is achieved by a connection unit according to claim 1. For this purpose, the connection unit has a non-conductive connection ring, the connection ring has a ring axis and three retaining components that respectively imitate a ring shape, the retaining components each having at least one receiving portion that is open at least on one side or can be opened at least on one side, and the connection ring includes three connection wires that are respectively matched to one of the ring shapes of the three retaining components, the connection wires are respectively inserted from the open side or the openable side of at least one subordinate receiving portion, wherein the three connection wires are arranged on different connection planes as seen in the direction of the ring axis and can be electrically connected to the input wires of the excitation coil that can be associated with each of the three phases, wherein the retaining components are constructed as plug / lock modules that can be stacked at least in a specific order and can be connected to each other.

[0006] Here, the number of excitation coils corresponds to N times the number of phases, where n corresponds to a natural number greater than 1. The connecting wire is a structure (Gebilde) that is preferably kept constant in cross-sectional shape and preferably kept constant in cross-sectional size by a wire drawing process. More preferably, no waste is produced in the case of manufacturing the connecting wire compared to stamped conductor tracks and stamped conductor guides. The cross-sectional size of the connecting wire corresponds to the number of excitation coils connected thereto, which is preferably greater than the individual cross-sectional sizes of the subordinate input line ends. Thus, cost-effective and easy-to-manufacture structural elements are used. The term connecting ring refers to a substantially completely encircling ring, wherein the annular shape can be derived from any regular and irregular polygonal shape or circular shape. It is preferably a polygonal circumferential shape, which has an angular number corresponding to the number of excitation coils. The term annular shape means at least an annular arrangement, wherein there may be gaps; the annular shape can be preset by any regular and irregular polygonal circumferential shape or circular circumferential shape, preferably a polygonal circumferential shape with an angular number corresponding to the number of excitation coils. Non-conductive means that the coupling ring has an electrically insulating non-conductive coating or an electrically insulating non-conductive sheath, or is composed of a non-conductive material (preferably a plastic material). The housing may also have other notches, a lattice structure, etc., as long as the appropriate arrangement of the coupling wire therein is ensured, which prevents the coupling wire from being displaced or accidentally deformed to the greatest extent. Multiple housing sections may be arranged in an annular shape (there may be gaps between the sections or in the housing). It is important to uniformly accommodate the corresponding coupling wires with an annular shape. For example, the retaining assembly is designed as a plug / locking module to realize the separate equipment of the retaining assembly with the coupling wire and then connected to another retaining assembly, which may also be equipped with the coupling wire. Thus, if necessary, the coupling wire is arranged in a concealed manner at least over a large area without making it difficult to insert, or, if necessary, for example, when the plug / locking module is designed to be able to be released from each other again, the subsequent recovery will not be difficult. Thus, different arrangement feasibility is opened, and the arrangement feasibility is independent of the separate possible equipment of the retaining assembly with the coupling wire. In the case of a cleverly designed plug / latch module, the assembly of the holding assembly can also be automated very easily, thereby greatly simplifying the entire joining process of the coupling unit, but still resulting in a compact construction.

[0007] Preferably, the holding components are arranged one behind the other in a stacked arrangement, viewed in the direction of the ring axis. The holding components can then be easily plugged onto one another and latched into one another. The holding components can have identical outer dimensions, so that they together form a very uniform coupling ring, preferably with a uniform outer contour. As a result, the coupling ring can also be designed to be very narrow due to the holding components and coupling lines arranged one behind the other.

[0008] Although the respective connecting wires do not necessarily have to be arranged in the receptacle over their entire circumference due to, for example, the presence of gaps etc., it is expedient according to another embodiment that at least one of the holding components has, as a receptacle, an annularly circumferential receiving recess which is open on at least one side or can be opened on at least one side, into which the associated connecting wire is inserted from the open side or the openable side. As a result, the respective connecting wires are protected over their entire circumference and their shape is retained. In particular, since the connecting wires are preferably used without their own insulating layer, very good insulation of the connecting wires from one another is also achieved.

[0009] According to an advantageous embodiment, the coupling ring can have a window recess that can be overlapped on each of the three connection planes of the respectively subordinate input line ends, so that free lateral access can be achieved not only from the inner side of the coupling ring but also from the outer side of the coupling ring, so as to place the welding tongs to weld the corresponding connection line with the respectively subordinate input line ends. In the sense of the present invention, the term overlapped means that the position of the input line end is known, and the window recess is arranged so that the lateral access or gripping of the input line end and the subordinate connection line becomes possible. The input line end and the connection line must be simultaneously contacted and pressed together by the clamp-shaped movement of the welding tongs, preferably the movement and force application are basically perpendicular to the plane opened by the corresponding window recess. This gripping must be realized at all three connection planes for each input line end. Therefore, the connection can be made using a very efficient robot technology. It is only necessary to supply the coupling ring in the position preset by the position of the input line end, and then perform welding. As a welding method, all connection technologies responsible for the corresponding heat input can be used, which can preferably also connect different metals to each other. The receiving part can also have further recesses, lattice structures, etc., as long as it is ensured that the connecting wires are arranged in them in such a way that displacement or unintentional deformation thereof is prevented to the greatest extent possible. A plurality of sections of the receiving part can be arranged in an annular shape (there may be gaps between or in the receiving parts). What is important is the common accommodation of the corresponding connecting wires having an annular shape.

[0010] Preferably, each receptacle has a bottom bridge and two bridge-shaped side walls arranged at a distance from one another, wherein the bottom bridge of the receptacle of the first holding assembly forms a cover for the receptacle of the second holding assembly and / or the bottom bridge of the second receptacle forms a cover for the receptacle of the third holding assembly. This simplifies the structure, since each receptacle is, to a certain extent, a receiving guide for at least a section of the connecting line. In addition, the bottom bridge of a holding assembly arranged above another holding assembly can close the receptacle of the holding assembly located below it as a cover and ensure improved electrical insulation of the connecting line arranged below it.

[0011] In a variant, it is provided that the retaining components are connected to one another by means of plug tongues aligned with the side walls and plug receptacles aligned with the side walls and compatible with the plug tongues. The retaining components can then be stacked and positioned relative to one another similar to clamping modules. The plug pattern can be selected so that the retaining components can only be engaged in one or certain positions. After the plugging process, the retaining components are prevented from twisting relative to one another about the ring axis.

[0012] Furthermore, according to one embodiment, it can be provided that the holding components are connected to one another by means of at least one latching nose projecting from at least one (preferably inner) side wall and at least one latching recess arranged so as to project from at least one (preferably inner) side wall, which latching recess accommodates the respectively associated latching nose. This prevents a holding component from being easily removed from the other holding component in the opposite direction of plugging. The latching can preferably be released again, so that the connection line and the holding component can be recovered very easily.

[0013] According to another embodiment, it is provided that the holding assembly has a latching lug in the region of at least one receptacle for latching the connection cable in the at least one receptacle. Thus, by inserting the connection cable into the associated holding assembly, the connection cable is securely fixed or anchored in the desired position in the at least one associated receptacle. The latching can be designed to be releasable (can be opened without destruction) or non-releasable (can only be opened by destruction). Furthermore, the latching lug can be produced very easily by means of an injection molding process, provided that the connection ring is manufactured by injection molding.

[0014] More preferably, the retaining assembly can have a plurality of component sleeves at the inner side wall that can respectively accommodate the corresponding input line ends, wherein each component sleeve of one retaining assembly is aligned with the component sleeve of another retaining assembly for accommodating the corresponding input line end, and is aligned with the corresponding window recess of another retaining assembly. Therefore, when using three connecting wires and three retaining assemblies, each input line end is accommodated or guided by two component sleeves so that it is arranged to be well positioned in front of the window recess of the third retaining assembly. The arrangement of the input line end in the corresponding component sleeve then depends on the position of the window recess. If the window recess is arranged in the second (i.e., the center) retaining assembly, then one component sleeve is located above the window recess and one component sleeve is located below the window recess. If the window recess is arranged in the first or third retaining assembly, the corresponding component sleeves are directly located side by side below or above the window recess.

[0015] In order to be able to produce a good welded connection in the area of ​​the window recess, the bottom bridge is preferably designed to be thinner laterally in the area of ​​the window recess, so that the lower edge of the window recess is substantially aligned with the associated upper side of the lateral area of ​​the bottom bridge, and the bottom bridge has an elevated central area in the area of ​​the window recess for placing the corresponding connecting wire. Due to the resulting deeper window recess, the construction of the welded connection is simplified.

[0016] The invention also relates to a three-phase electric machine having at least six field coils, a stator core, a main axis and a connection unit according to any one of claims 1 to 10, wherein the field coils each have an input line end and each have an output line end, and wherein the input line end is connected to the correspondingly associated connection line in the region of a first end face of the stator core. The electric machine can be manufactured very easily and cost-effectively. An automatable contact with the connection unit is achieved in the region of the end face of the stator core.

[0017] In one embodiment of the electric machine, it is provided that the output line ends are electrically connected to each other by means of a fourth connecting line that is encircled in an annular manner, and the fourth connecting line is inserted into a non-conductive fourth holding component that imitates an annular shape from the open side or openable side of at least one receptacle of the fourth holding component, the fourth holding component having at least one receptacle that is open on at least one side or openable on at least one side, so that the fourth connecting line is held at a parallel distance from the second end side of the stator laminated core, and wherein the fourth holding component (i.e. at least the receptacle) has a recess that overlaps with the corresponding output line end, which is arranged so that free access can be achieved for placing welding tongs to weld the fourth connecting line and the corresponding output line end. Thus, the star connection is carried out at the opposite end sides of the stator laminated core. This can also be produced in a simplified and cost-effective manner, wherein the space requirement is very small. As a result, the wiring expenditure at the first end side of the stator laminated core by means of the connection unit can also be reduced. For this embodiment of the electric machine, it can also be protected independently of the specific features of the connection unit and it can therefore be the subject of a sub-application. It is essential that the wiring of the input leads takes place in the region of a first end face of the stator laminated core and that the wiring of the output leads specified in claim 12 is present in the region of a second end face of the stator laminated core.

[0018] More advantageously, the field coil can be arranged on an insulator surrounding the stator teeth of the stator laminated core, wherein the insulator has a fastening device protruding beyond the first end side of the stator laminated core at the outer circumference in an annular manner, whereby the insulator is connected to the coupling ring, and / or wherein the insulator has a shaft ring (Bund) protruding beyond the second end side of the stator laminated core, which shaft ring forms the fourth retaining component. Therefore, for fixing the connection unit, components already existing at the motor can be used. The insulator is preferably manufactured by injection molding, so that the required fastening device can be molded together at the same time during manufacturing. The fourth retaining component can also be molded in the same way on the opposite side of the insulator. This can reduce manufacturing costs.

[0019] There is also the feasibility that the receiving portion of the fourth holding assembly has a bottom bridge portion and two bridge-shaped side walls arranged at a certain distance from each other, the outer side wall and the bottom bridge portion are respectively interrupted in the area of ​​the output line end for constructing a recess, wherein an assembly notch aligned with the recess is provided at the inner side wall, and the protruding end of the corresponding output line end is bent into the assembly notch, wherein the bent end of the corresponding output line end and preferably placed on the fourth connecting line is connected to the fourth connecting ring in the area of ​​the notch and the assembly notch. The selected connection structure for producing a star connection is constructed in a similar manner to that in the connecting unit. The cross-section of the fourth connecting line is preferably the same as the other three connecting lines. Preferably, it can have the same circular shape as the third connecting line, thereby reducing the number of different components in the stator. Due to the distance between the notch and the fourth connecting line and the second end side of the stator laminated core, the fourth connecting line can be pressed out from the fourth holding assembly again, thereby simplifying recycling.

[0020] The invention also relates to the use of at least two retaining assemblies for producing a connection unit according to any one of claims 1 to 10. The retaining assemblies, each simulating a ring shape, are constructed as plug / lock modules that can be stacked at least in a specific order and can be connected to each other and are each provided with at least one receiving portion that is preferably open on at least one side or can be opened on at least one side. The connecting line can be inserted into the receiving portion of at least one of the retaining assemblies in a state separated from at least one other retaining assembly, wherein then at least two retaining assemblies are plugged / locked to each other. The modular structure simplifies manufacturing and, if necessary, also simplifies recycling. The connecting line can be placed in a hidden manner in the connection unit for the most part, but the automatic installation of the connecting line and the assembly of the connection unit can still be achieved very simply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Below, an embodiment of the present invention is explained in more detail with reference to the accompanying drawings. For the sake of simplicity, only the essential parts of the stator are shown. The illustration of the housing and the rotor rotating inside the stator is omitted. In addition, reference may be made to known housing and rotor constructions.

[0022] in:

[0023] Figure 1 shows a perspective front view of a stator with a coupling unit according to the invention for an electric machine according to the invention,

[0024] Figure 2 Shows Figure 1 A perspective front view of a stator without a coupling unit according to the invention in FIG.

[0025] Figure 3 Shows Figure 2 A perspective rear view of the stator in

[0026] Figure 4 Shows the layout Figure 1 A perspective view of the field coils in the stator,

[0027] Figure 5 Shows the layout Figure 1 A perspective view of the stator laminated core in the stator of FIG.

[0028] Figure 6 Shows the layout Figure 1 A perspective front view of the insulator in FIG.

[0029] Figure 7 Shows Figure 6 A perspective rear view of the insulator in

[0030] Figure 8 The full cross-section view rotated about the ring axis shows Figure 1 The connection unit in

[0031] Fig. 9 Shows Figure 8 An enlarged view of the cross section IX-IX in FIG.

[0032] Fig.10 Shows Figure 8 A perspective front view of a connection unit cut out in FIG.

[0033] Fig.11 Shows Fig.10 A perspective rear view of a cut-away connection unit in FIG.

[0034] Fig.12 The view rotated about the ring axis shows Figure 1 Front view of the connection line with contact surface in

[0035] Fig.13 Shows Fig.12 A top view of the connecting line in

[0036] Fig.14 Shows along Figure 7 An enlarged cross-sectional view of the fourth retaining assembly taken along line XIV in FIG. 1 and having an inserted connecting line, and

[0037] Fig.15 An enlarged front view of the receiving portion toward the fourth retaining assembly is shown. DETAILED DESCRIPTION

[0038] Figure 1 The stator 1 shown in FIG. 1 is provided for a three-phase motor (not shown), which additionally has a motor housing and a rotor rotatably arranged inside the stator. The stator 1 has a stator core 2 (see also FIG. 2 ) which is shown in a simplified manner. Figure 5 ), twelve excitation coils 3.1, 3.2 and 3.3 shown in simplified form (see Figure 4 ), insulator 4 (see Figure 6 and 7 ) and the connecting unit 5 (see also Figures 8 to 13 ).

[0039] The excitation coils 3.1, 3.2 and 3.3 are each wound from enameled insulated copper wire and have a coil opening 30 in the shape of a rounded rectangle. In cross section, the winding bundles (Wicklungsstrang) of the excitation coils 3.1, 3.2 and 3.3 are approximately trapezoidal, wherein the corners are rounded, whereby the narrow sides pointing toward the inside of the stator also acquire an almost completely circular shape. The excitation coils 3.1, 3.2 and 3.3 are each assigned to one of the three phases of the motor, namely the excitation coil 3.1 of the first phase, the excitation coil 3.2 of the second phase and the excitation coil 3.3 of the third phase. Therefore, in the embodiment shown, four excitation coils 3.1, 3.2 or 3.3 are assigned to each of the three phases. The arrangement of the excitation coils 3.1, 3.2 and 3.3 is carried out in such a way that they are respectively alternated when viewed around. Each of the excitation coils 3.1, 3.2 and 3.3 is provided with an input wire end 6.1, 6.2 or 6.3 at one end (slightly offset laterally). The input wire ends 6.1, 6.2 and 6.3 are the ends of the winding wire axis protruding parallel to the main axis A of the motor. There are two different lengths of axial protrusion of the input wire ends 6.1, 6.2 and 6.3, that is, the input wire end 6.1 has the smallest protrusion length, and the input wire ends 6.2 and 6.3 have the same protrusion length. All input wire ends 6.1, 6.2 and 6.3 are at the same distance from the main axis A and are therefore located on a circular line coaxially surrounding the main axis A.

[0040] At the other end of the field coils 3.1, 3.2 and 3.3, an output terminal 7 is provided approximately in the extension of the outer outer edge. In the blank for the field coils 3.1, 3.2 and 3.3, the output terminal initially protrudes only axially parallel to the main axis A and is at the same distance from the main axis A and is therefore located on a circular line that runs coaxially around the main axis A. The output terminal 7 only acquires the curved shape during the contacting described further below.

[0041] The stator 1 described here and therefore the associated electric machine is operated in a star connection, i.e. the input terminals 6.1, 6.2 and 6.3 are each assigned to one of the three control phases and the output terminals 7 are connected together to form a star point in a manner described in more detail. However, this also means that the corresponding wiring for the star connection is carried out at different ends of the stator 1.

[0042] The stator laminated core 2 is composed of a large number of soft iron laminates of the same shape and insulated from each other, and has protruding stator teeth 8 on its inner side, each of which has a pole shoe 9. There are accommodating channels 10 between the stator teeth 8 for accommodating the excitation coils 3.1, 3.2 and 3.3 and the insulator 4. Longitudinal slots 11 are respectively formed between the pole shoes 9. The pole shoes 9 are concave on their side facing away from the inside of the stator, so that they together form a cylindrical accommodating space (not shown) for the rotor.

[0043] The insulator 4 consists of a first ring part 12 and a second ring part 13. This means that the insulator 4 is divided approximately in the center transversely to its axis. The insulator 4 has a profile on its inner side that imitates the outer profile of the stator teeth 8 and the pole shoes 9, so that the first ring part 12 can be pushed onto the stator laminated core 2 from the first end side 14, and the second ring part 13 can be pushed onto the stator laminated core 2 from the second end side 15. However, the side of the pole shoe 9 pointing to the inside of the stator remains free and is not covered by the insulator 4. The side surfaces of the stator teeth 8 and the pole shoes 9 are completely covered by the insulator 4, wherein the insulator 4 is tightly around them like a sleeve. In the same way, the accommodating channel 10 is also completely lined by the insulator 4. The insulator 4 is made of plastic material by injection molding. The insulator 4 has a polygonal extension in the area of ​​its end ends, wherein the number of angles of the polygon corresponds to the number of excitation coils 3.1, 3.2 and 3.3. As soon as the insulator 4 has been pushed onto the stator core 2 , wherein bonding of the first ring part 12 and the second ring part 13 can take place, the field coils 3 . 1 , 3 . 2 and 3 . 3 are wound onto the insulator 4 and the stator teeth 8 covered by the insulator 4 .

[0044] In addition, the insulator 4 has a fastening device 16 that is annularly encircled at the outer circumference at its first end associated with the first end side 14 of the stator laminated core 2. The annular shape of the fastening device 16 is a dodecagon, which surrounds the end areas of the excitation coils 3.1, 3.2 and 3.3, wherein the corners of the dodecagon are arranged between the two excitation coils 3.1, 3.2 and 3.3 respectively. The fastening device 16 has an offset (Versatz) 17 toward the outside relative to the contour of the insulator 4 surrounding the accommodating channel 10. Therefore, the fastening device 16 is located on the first end side 14 of the stator laminated core 2 and thus serves as a stop when the first ring part 12 of the insulator 4 is introduced. The annular fastening device 16 has a height that roughly corresponds to the protrusion of the excitation coils 3.1, 3.2, 3.3 on the first end side 14 of the stator laminated core 2. There is a latching opening 18 in each polygonal section of the fastening device 16. The fastening device 16 serves to attach the connecting unit 5 in the region of the first end face 14 of the stator core 2 .

[0045] The coupling unit 5 has a coupling ring 19 made of plastic and acting in an insulating manner, which has a dodecagonal shape with rounded corners. The coupling ring 19 is provided on its underside with a dodecagonal collar 20, which can be pushed onto the fastening device 16 with a substantially exact fit. On the inside, the collar 20 is provided with latching lugs 21, which each engage from the outside in the latching opening 18 of the fastening device 16. The coupling ring 19 is provided adjacent to the collar 20 with a stepped shoulder 22, which is located on the end side on the fastening device 16 and thus serves as a stop.

[0046] The coupling ring 19 also includes a first annular channel-shaped retaining assembly 23, a second annular channel-shaped retaining assembly 24 and a third annular channel-shaped retaining assembly 25. All three retaining assemblies 23, 24 and 25 are configured as plug / lock modules that can be stacked and connected to each other in a preset order. A first connecting line 26 of annular design is arranged in the first retaining assembly 23, a second connecting line 27 of annular design is arranged in the second retaining assembly 24, and a third connecting line 28 of annular design is arranged in the third retaining assembly 25. All three connecting lines 26, 27 and 28 have the same cross-sectional shape (in the present case, a square with rounded corners) and are made of copper or a copper alloy (can also be aluminum or an aluminum alloy).

[0047] The first holding component 23 has a receiving portion 29 formed by twelve sections arranged in a polygonal shape. Each section of the receiving portion 29 of the first holding component 23 has a bottom bridge portion 31 extending perpendicular to the ring axis R and two bridge-shaped side walls 32 and 33 arranged perpendicular to it and at a certain distance from each other. The side walls 32 and 33 are inclined at the open end of the receiving portion 29 to better introduce the first connecting line 26. At the lower side of the bottom bridge portion 32, the first holding component 23 has twelve plug projections 42 evenly distributed around the ring axis R, which protrude in a peak manner at the lower side of the bottom bridge portion 31 over the entire width of the bottom bridge portion 31. The upper edges of the side walls 32 and 33 are provided flush with the plug projections 42 with plug receiving portions 60 compatible with the plug projections 42. The height of the plug projections 42 is slightly less than the height of the side walls 32 and 33 on the bottom bridge portion 31 minus the height of the connecting line 26. Furthermore, the first retaining component 23 has twelve latching lugs 61 on the outer side of the upper region of the inner side wall 33, which are arranged uniformly and offset about the ring axis R. The lower section of the inner side wall 33 is provided flush with the latching lugs 61 with latching recesses 62 compatible with the latching lugs. To form each latching recess 62, a frame-shaped projection projects laterally downwardly beyond the underside of the bottom bridge 31.

[0048] The second retaining assembly 24 also has a receiving portion 35 formed by twelve segments arranged in a polygonal shape. The receiving portion 35 of the second retaining assembly 24 has a bottom bridging portion 31 and two bridging portion-shaped side walls 36 and 37 arranged perpendicular to the bottom bridging portion 31 and spaced a certain distance from each other. The side wall 32 and the side wall 36 stand upright and aligned with each other. In the same manner, the side walls 33 and 37 stand upright and aligned with each other. Therefore, the segments of the receiving portion 29 of the first retaining assembly 23 and the segments of the receiving portion 35 of the second retaining assembly 24 are stacked on each other so that the open sides of the receiving portions 29 and 35 point in the same direction. Accordingly, the first retaining assembly 23 is arranged behind the second retaining assembly 24 (in the direction of the ring axis R, and viewed from below ( Figure 8)). At the lower side of the bottom bridge 31, the second retaining component 24 has twelve plug projections 42 evenly distributed around the ring axis R, which protrude in a peaked manner at the lower side of the bottom bridge 31 over the entire width of the bottom bridge 31. The upper edges of the side walls 36 and 37 are provided flush with the plug projections 42 and are compatible with the plug projections 42. The height of the plug projections 42 is slightly less than the height of the side walls 36 and 37 on the bottom bridge 31 minus the height of the connecting wire 26. The plug projections 42 of the first retaining component 23 engage in the plug receiving portion 60 with an exact fit, thereby producing an engagement. At the same time, the connecting wire 27 is additionally fixed in its position by means of the plug tongues 42 of the first retaining component 23. In addition, the second retaining component 24 has twelve latching protrusions 61 evenly arranged and offset around the ring axis R on the outer side of the upper region of the inner side wall 37. The lower section of the inner side wall 33 is provided flush with the latching lugs 61 with latching recesses 62 compatible with the latching lugs 61. To form each latching recess 62, a frame-shaped projection laterally protrudes downwardly beyond the lower side of the bottom bridge 31. The latching lugs 61 of the second holding component 24 are correspondingly snapped into the latching recesses 62 of the first holding component 23. Similarly, the side walls 36 and 37 are each inclined at the open end of the receiving portion 35 in order to better introduce the second connecting wire 27.

[0049] Due to the design of the first holding assembly 23 and the second holding assembly 24, the first connection line 26 and the second connection line 27 can be implemented identically. In the present case, even the complete first holding assembly 23 and the second holding assembly 24 are constructed identically to obtain identical components. Therefore, in the stacked state, they are at the same distance from the ring axis R. The bottom bridge 31 of the first holding assembly 23 forms a cover for the accommodation 35 of the second holding assembly 24.

[0050] The third holding component 25 also has twelve sections of the receiving portion 38 arranged in a polygonal shape. Each section of the receiving portion 38 of the third holding component 25 has a bottom bridge portion 39 extending perpendicular to the ring axis R and two bridge-shaped side walls 40 and 41 arranged perpendicular to it and at a certain distance from each other. The upper edges of the side walls 40 and 41 are provided with a plug receiving portion 60 compatible with the plug projection 42 of the second holding component 24. In addition, the third holding component 25 has twelve locking protrusions 61 uniformly arranged around the ring axis R on the outer side of the upper area of ​​the inner side wall 33. The collar 20 and the stepped shoulder 22 are arranged at the lower side of the bottom bridge portion 39. The side walls 40 and 41 are inclined at the open end of the receiving portion 38 to better introduce the third connecting line 27. The side walls 36 and 40 are erected and aligned with each other. In the same way, the side walls 37 and 41 are erected and aligned with each other. Therefore, the section of the receiving portion 35 of the second holding component 24 and the section of the receiving portion 38 of the third holding component 25 are stacked on each other so that the open sides of the receiving portions 29, 35 and 38 point in the same direction. Here, the plug projection 42 of the second holding component 24 engages in the plug receiving portion 60 of the third holding component 25 (as in the first holding component 23 and the second holding component 24). Accordingly, the third holding component 25 is arranged behind the second holding component 24 and the first holding component 23 (in the direction of the ring axis R and viewed from below ( Figure 8 )). The latching nose 61 of the third holding component 25 is correspondingly latched into the latching recess 62 of the second holding component 24. Similarly, the side walls 40 and 41 are correspondingly inclined at the open end of the receiving portion 38 to better introduce the second connecting line 28. The bottom bridge portion 31 of the second holding component 24 forms a cover for the receiving portion 38 of the third holding component 25.

[0051] In particular, according to Fig.12 and Fig.13It can be seen that the connection wires 26, 27 and 28 are located in three planes arranged along the ring axis R and extending perpendicularly to the ring axis R. All three connection wires 26, 27 and 28 have the same circumference, that is, they are designed identically. The annular shape of the connection wires 26, 27 and 28 has a gap 43 at one point. The gap 43 is bridged by means of contact plates 44, 45 and 46 that match the corresponding connection wires 26, 27 and 28. The first contact plate 44 is welded to the first connection wire 26, the second contact plate 45 is welded to the second connection wire 27, and the third contact plate 46 is welded to the third connection wire 28. The first contact plates 44, 45 and 46 are welded from above to the subordinate connection wire 26 or 28. The three contact plates 44, 45, 46 are arranged side by side in the annular shape of the connection wires 26, 27 and 28 and extend forward from the connection unit 5 for receiving contact plugs (not shown). Each contact plate 44, 45, 46 has a bent foot region 47, 48 and 49 and a straight plug region 50, 51, 52. By means of contact plugs placed on the plug regions 50, 51 and 52, the three connecting wires 26, 27 and 28 are connected to each of the phases.

[0052] The coupling ring 19 has a contact recess 53, 54 and 55 in each case in the region of the upper edge of the associated side walls 32, 36 and 40 in the lateral extension of the respectively associated window recesses 56, 57 and 58. The first contact recess 53 for the first contact plate 44 is located in the side wall 32 of the associated receptacle 29. The first contact recess 53 has a height which corresponds approximately to the thickness of the first contact plate 44. The second contact recess 54 has a height which corresponds approximately to the thickness of the second contact plate 45. The curvature of the second contact plate 45 is selected so that it contacts the second connection line 27 offset by 30° about the ring axis R from the first contact plate 44. The third contact recess 55 is arranged in the side wall 40 of the receptacle 38 and extends from the upper edge of the side wall 40 and has a height which corresponds approximately to the thickness of the third contact plate 46. The curvature of the third contact plate 46 is selected such that it contacts the third connecting line 28 offset by 30° about the ring axis R from the first contact plate 44, specifically in the opposite direction to the second contact plate 45. Figure 1 It can be seen in FIG. 7 that, in addition to imparting a dimensionally accurate plug pattern and serving as a plug stop, the plastic component 74 is pushed onto the plug regions 50 , 51 , 52 of the contact plates 44 , 45 , 46 , which are supported at the upper side of the coupling ring 19 .

[0053] Each third section of the receiving part 29, 35 or 38 of the first, second and third holding components 23, 24 or 25 is provided with a correspondingly associated window recess 56, 57, 58. The first window recess 56 is located in the side walls 32 and 33 of each third section of the receiving part 29 of the first holding component 23. The two window recesses 56 of the section of the receiving part 29 are arranged opposite each other. The bottom bridge 31 is laterally thinner in the area of ​​the window recess 56, so that the lower edge of the window recess 56 is aligned with the corresponding upper side of the laterally thinner area of ​​the bottom bridge 31. As a result, the bottom bridge 31 also forms an elevated central area in the area of ​​the window recess 56 for placing the connecting wire 26. The height of the window recess 56 corresponds essentially to the height of the side wall 32 or 33 plus the thickness reduction of the bottom bridge 31 in the lateral area, that is, it extends from the upper side of the laterally thinner area of ​​the bottom bridge 31 to the upper edge of the side wall 32 or 33. The window recess 56 in the side wall 32 is designed to be slightly narrower than the window recess 56 in the side wall 33. The reason for this is that a latching lug 59 is arranged next to the window recess 56 in the side wall 32, with which the first connecting wire 26 is held in place in the receptacle 29 and can be gripped by means of a tool through the opposite window recess 56 in the side wall 33 for the purpose of recovery. The first holding component 23 has a total of four such latching lugs 59, each adjacent to a window recess 56 in the side wall 32.

[0054] The second window recess 57 is located in the side walls 36 and 37 of each third section of the receiving portion 35 of the second holding component 24. The two window recesses 57 are arranged opposite each other. The bottom bridge 31 is laterally thinner in the region of the window recess 57, so that the lower edge of the window recess 57 is aligned with the corresponding upper side of the laterally thinner region of the bottom bridge 31. As a result, the bottom bridge 31 also forms an elevated central area in the region of the window recess 57 for placing the connecting wire 26. The height of the window recess 57 corresponds essentially to the height of the side wall 32 or 33 plus the thickness reduction of the bottom bridge 31 in the lateral region, that is, it extends from the upper side of the laterally thinner region of the bottom bridge 31 to the upper edge of the side wall 32 or 33. The window recess 57 in the side wall 36 is designed to be slightly narrower than the window recess 57 in the side wall 37. The reason for this is that a latching lug 59 is arranged next to the window recess 56 in the side wall 36, with which the second connecting line 27 is held in place in the receptacle 35 and which can be gripped with a tool for recovery purposes through the opposite window recess 57 in the side wall 37. The second holding assembly 24 has a total of four such latching lugs 59, each adjacent to a window recess 57 in the side wall 36.

[0055] A third window recess 58 is located in the side walls 40 and 41 of each third section of the receiving portion 38 of the third holding assembly 25. The two window recesses 58 are arranged opposite each other. The bottom bridge 31 is laterally thinner in the region of the window recess 58, so that the lower edge of the window recess 58 is aligned with the corresponding upper side of the laterally thinner region of the bottom bridge 31. As a result, the bottom bridge 31 also forms an elevated central region in the region of the window recess 58 for placing the connecting wire 28. The height of the window recess 58 corresponds essentially to the height of the side wall 40 or 41 plus the thickness reduction of the bottom bridge 31 in the lateral region, i.e., it extends from the upper side of the laterally thinner region of the bottom bridge 31 to the upper edge of the side wall 40 or 41. The window recess 58 in the side wall 40 is designed to be narrower than the oppositely arranged window recess 58 in the side wall 41. The reason for this is that a latching lug 59 is arranged next to the window recess 56 in the side wall 40, with which the third connecting line 28 is held in place in the receptacle 38 and can be gripped with the aid of a tool through the opposite window recess 58 in the side wall 41 for the purpose of recovery. The third holding assembly 25 has a total of four such latching lugs 59, each adjacent to a window recess 58 in the side wall 40.

[0056] The second window recess 57 is arranged offset by 30° relative to the first window recess 56 around the ring axis R. The third window recess 58 is arranged offset by 30° relative to the second window recess 57 around the ring axis R and is arranged offset by 60° relative to the first window recess 56 around the ring axis R. This offset arrangement is repeated four times on the circumference of the coupling ring 19. The first window recess 56 is located at the height of the first coupling plane of the first coupling line 26. The second window recess 57 is located at the height of the second coupling plane of the second coupling line 27. The third window recess 58 is located at the height of the third coupling plane of the third coupling line 28.

[0057] All three holding components 23, 24, 25 are additionally provided with eight component sleeves 63 on the inner side walls 33, 37, 41 for receiving the respective input line ends 6.1, 6.2, 6.3, i.e. the axis of the cylindrical sleeve openings in the stacked arrangement runs parallel to the ring axis R. The component sleeves 63 are arranged distributed on the respective holding components 23, 24 and 25 in such a way that two component sleeves 63 of two of the three holding components 23, 24 and 25 (23 and 24 or 23 and 25 or 24 and 25) are always flush with one of the window recesses 58, 57 and 56 of the respective remaining holding component (25 or 24 or 23) and the respective input line ends 6.1, 6.2, 6.3 are approximately centered relative to the respective narrower window recesses 56, 57, 58 in the side walls 32, 36, 40.

[0058] If the connection unit 5 is placed Figure 2 When connecting the connecting unit 5 to the stator blank (Statorrohling) shown in the figure, it should be noted that the ring axis R and the main axis A are aligned and the connecting unit 5 is rotated in such a way that the first input line end 6.1 is aligned with the component sleeve 63, and the connecting unit 5 can be placed on the stator blank in the axial direction. The locking nose 21 is snapped into the locking opening 18 at the ring 20. The first input line end 6.1 extends through the aligned component sleeves 63 of the second retaining component 24 and the third retaining component 25, and extends parallel to the first window recess 56 of the side wall 32 to approximately the height of the upper edge of the first retaining component 23. The second input line end 6.2 is accommodated and guided by the mutually aligned component sleeves 63 of the first retaining component 23 and the third retaining component 25 below and above the second window recess 57 in the side wall 36 ( Fig. 9 The third input line terminal 6.3 is received and guided by the mutually aligned assembly sleeves 63 of the first holding assembly 23 and the second holding assembly 24 above the window recess 58 in the side wall 40 ( Fig. 9 ). As a result, the contact sections of all input line ends 6.1, 6.2, 6.3 are located directly next to the correspondingly assigned connecting line 26, 27 or 28 at the height of the subordinate connecting plane, without any other elements being arranged between them. Due to the correspondingly assigned first window recess 56, second window recess 57 and third window recess 58, it is now possible to directly grasp the input line ends 6.1, 6.2, 6.3 and the correspondingly assigned connecting line 26, 27 or 28 through these recesses with the help of welding tongs. Therefore, a welding action corresponding to a clamp-like movement can be performed, which is basically carried out transversely to the main axis A. As a result, it is possible to achieve automated and very precise contact between the input line ends 6.1, 6.2 and 6.3 and the correspondingly assigned connecting line 26, 27 or 28.

[0059] The waste-free production of the connecting wires 26, 27 and 28 and the arrangement in the connecting ring 19, which is constructed from a plug / locking module that can be produced as a tool-free component, ensures cost-effective production. The assembly of the connecting ring 19 with the connecting wires 26, 27 and 28 can also be carried out very simply and automatically. The selected design with the locking position of the connecting wires 26, 27 and 28 and the gripping of the locking lugs 59 and the corresponding underside of the connecting wires 26, 27 and 28 by means of a tool also simplifies the recovery of valuable raw materials.

[0060] The following will be added using Fig.14 and Fig.15 The design of the star connection at opposite end sides of the stator laminated core 2 is explained in more detail.

[0061] A fourth retaining component 64 is molded at the second ring portion 13 of the insulator 4, protruding beyond the second end side of the stator laminated core 2 in the form of a collar. The fourth retaining component 64 accommodates the polygonal shape of the second ring portion 13. The fourth retaining component 64 has an offset 65 relative to the section of the second ring portion 13 that lines the accommodating channel 10, which is used to be placed on the second end side 15 of the stator laminated core 2. The fourth retaining component 64 is used to arrange a fourth connecting wire 66. The connecting wire 66 is designed to be the same as the third connecting wire 28. However, there is no gap 43, but the two ends of the fourth connecting wire 66 are butt-welded.

[0062] In order to accommodate the fourth connecting wire 66, the fourth retaining component 64 has sections (accommodation recesses) of the receiving portion 67 that are evenly distributed on the circumference and open on one side. The sections of the receiving portion 67 form a kind of insertion groove for the fourth connecting wire 66. There are notches 68 between the twelve sections of the receiving portion 67. In these notches 68, elastic locking protrusions 69 and component notches 70 are arranged side by side above the adjacent sections of the receiving portion 67. The component notches 70 are flush with the output wire end 7 protruding at the second end side 15 of the stator laminated core 2. Fig.14 As can be seen in the figure, the fourth connecting wire 66 is positioned in the receiving portion 67 by means of the latching lug 69. The receiving portion 67 has a bottom bridge 71 and two bridge-shaped side walls 72 and 73 arranged at a distance from each other. The bottom bridge 71 is oriented perpendicular to the main axis A. The two side walls 72 and 73 extend perpendicular to the bottom bridge 71. The bottom bridge 71 is positioned at a distance from the second end side 15 of the stator laminated core 2, so that the fourth connecting wire 66 is also positioned at a distance above the second end side 15 of the stator laminated core 2. The fourth connecting wire 66 is approximately at the height of the correspondingly assigned ends of the excitation coils 3.1, 3.2 and 3.3. Overall, the fourth retaining component 64 only slightly protrudes beyond the coil ends (mainly with the molded parts for the latching lug 69 and the component notch 70).

[0063] When connecting the output terminal 7 of each excitation coil 3.1, 3.2 and 3.3, the end area is first bent into the respective component notch 70 so that it is bent outward by 90°. As a result, the bent end area is located above the fourth connecting line 66 and can be placed on it. Now, the bent end area of ​​the output terminal 7 and the fourth connecting line 66 can be welded to each other with the help of welding tongs. This time, the welding is carried out with the movement of the welding tongs, which is basically implemented from top to bottom parallel to the main axis A. One of the welding jaws travels below the fourth connecting line 66, and the other welding jaw rests on the bent end area of ​​the subordinate output terminal 7. This welding process can also be automated and performed very quickly and accurately.

[0064] Reference Symbols List

[0065] 1 Stator

[0066] 2 Stator laminated core

[0067] 3.1 Excitation coil connected to the first phase

[0068] 3.2 Excitation coil connected to the second phase

[0069] 3.3 Excitation coil connected to the third phase

[0070] 4 Insulator

[0071] 5 Connection unit

[0072] 6.1 Input terminal of excitation coil 3.1

[0073] 6.2 Input terminal of excitation coil 3.2

[0074] 6.3 Input terminal of excitation coil 3.3

[0075] 7 Output terminal

[0076] 8 Number of stators

[0077] 9 Pole Shoes

[0078] 10 Accommodation channel

[0079] 11. Longitudinal seam

[0080] 12 First Ring Section

[0081] 13 Second Ring Section

[0082] 14 First end side

[0083] 15 Second end side

[0084] 16 Fastening equipment

[0085] 17 Offset

[0086] 18 Lock opening

[0087] 19 Coupling ring

[0088] 20 Rings

[0089] 21 Locking nose on collar

[0090] 22 Step Shoulder

[0091] 23. First retaining component

[0092] 24 Second holding component

[0093] 25 Third retaining assembly

[0094] 26 First connection line

[0095] 27 Second connection line

[0096] 28 Third connecting line

[0097] 29 Accommodation portion of the first holding assembly 23

[0098] 30 Coil opening

[0099] 31 Bottom bridge

[0100] 32 outer side wall of the accommodation portion 29

[0101] 33 Inner side wall of the accommodation portion 29

[0102] 35 Accommodation portion of the second holding assembly

[0103] 36 The outer wall of the accommodation portion 35

[0104] 37 Inner side wall of the accommodation portion 35

[0105] 38 Accommodation portion of the third holding assembly 25

[0106] 39 Bottom bridge portion of the receiving portion 38

[0107] 40 The outer side wall of the accommodation portion 38

[0108] 41 Inner side wall of the accommodation portion 38

[0109] 42 Plug protrusion

[0110] 43 Gap

[0111] 44 First contact plate

[0112] 45 Second contact plate

[0113] 46 Third contact plate

[0114] 47 First foot area

[0115] 48 Second foot area

[0116] 49 Third foot area

[0117] 50 First plug area

[0118] 51 Second plug area

[0119] 52 Third plug area

[0120] 53 First contact notch

[0121] 54 Second contact notch

[0122] 55 Third contact notch

[0123] 56 First window notch

[0124] 57 Second window notch

[0125] 58 Third window notch

[0126] 59 Locking nose in window recess

[0127] 60 Plug receiving portion

[0128] 61 Locking nose on the outside

[0129] 62 Lock notch

[0130] 63 Assembly Sleeve

[0131] 64 Fourth holding component

[0132] 65 offset

[0133] 66 Fourth connection line

[0134] 67 Receiving portion of fourth retaining assembly

[0135] 68 Notch

[0136] 69 Locking nose at fourth retaining assembly

[0137] 70 component gap

[0138] 71 Bottom bridge portion of the accommodation portion 67

[0139] 72 The outer wall of the accommodation portion 67

[0140] 73 inner side wall of the accommodation portion 67

[0141] 74 Plastic parts

[0142] A Main axis

[0143] R ring axis

Claims

1. A connection unit (5) for a three-phase motor, the motor having at least six excitation coils (3.1, 3.2, 3.3), the excitation coils each having an input terminal (6.1, 6.2, 6.3) and an output terminal (7), wherein: The coupling unit (5) comprises a non-conductive coupling ring (19), the coupling ring having a ring axis (R) and three retaining components (23, 24, 25) each imitating an annular shape, the retaining components each having at least one receiving portion (29, 35, 38) which is preferably open at least on one side or can be opened at least on one side, and the coupling ring comprises three coupling wires (26, 27, 28) which are respectively matched to one of the annular shapes of the three retaining components (23, 24, 25), the coupling wires are respectively preferably opened from the open side or the open side. The openable side is inserted into at least one subordinate receiving portion (29, 35, 38), wherein three connecting wires (26, 27, 28) are arranged on different connecting planes along the direction of the ring axis (R) and can be electrically connected to the input line ends (6.1, 6.2, 6.3) of the excitation coils (3.1, 3.2, 3.3) respectively associated with one of the three phases, wherein the retaining assembly (23, 24, 25) is constructed as a plug / locking module that can be stacked at least in a specific order and can be connected to each other.

2. The coupling unit (5) according to claim 1, characterized in that The holding assemblies (23, 24, 25) are arranged one behind the other in a stacked arrangement, viewed in the direction of the ring axis (R).

3. The coupling unit (1) according to claim 1 or 2, characterized in that: The coupling ring (19) has overlapping window recesses (56, 57, 58) on each of the three coupling planes of the respectively associated input line ends (6.1, 6.2, 6.3) so that free lateral access is possible both from the inside of the coupling ring (19) and from the outside of the coupling ring (19) for positioning welding tongs for welding the corresponding coupling wires (26, 27, 28) to the respectively associated input line ends (6.1, 6.2, 6.3).

4. The coupling unit (5) according to any one of claims 1 to 3, characterized in that: At least one of the holding components (23, 24, 25) has as a receiving portion (23, 24, 25) an annularly surrounding receiving recess which is open on at least one side or can be opened on at least one side, and a corresponding connecting line (26, 27, 28) is received in the receiving recess from the open side or from the openable side.

5. The coupling unit (5) according to any one of claims 1 to 4, characterized in that: Each accommodating portion (29, 35, 38) has a bottom bridging portion (31, 39) and two bridging portion-shaped side walls (32, 33; 36, 37; 40, 41) arranged at a certain distance from each other, and the bottom bridging portion (31) of the accommodating portion (29) of the first retaining component (23) forms a cover for the accommodating portion (35) of the second retaining component (24), and / or the bottom bridging portion (31) of the second accommodating portion (35) forms a cover for the accommodating portion (38) of the third retaining component (25).

6. The coupling unit (5) according to claim 5, characterized in that The holding components (23, 24, 25) are connected to one another by means of a plug projection (42) and a plug receptacle (60) compatible with the plug projection (42).

7. The coupling unit (5) according to claim 5 or 6, characterized in that: The retaining components (23, 24, 25) are connected to each other by means of at least one latching nose (61) protruding from at least one preferably inner side wall (32, 33; 36, 37; 40, 41) and at least one latching recess (62) arranged so as to protrude from at least one preferably inner side wall (32, 33; 36, 37; 40, 41), wherein the latching recess (62) accommodates the respectively associated latching nose (61).

8. The coupling unit (5) according to any one of claims 1 to 7, characterized in that: The holding assembly (23, 24, 25) has a latching lug (59) in the region of at least one receptacle (29, 35, 38) for latching the connecting line (26, 7, 20, 28) in the at least one receptacle (29, 35, 38).

9. The coupling unit (5) according to any one of claims 5 to 8, characterized in that The retaining components (23, 24, 25) have a plurality of component sleeves (63) on the inner side walls which can respectively accommodate corresponding input line terminals (6.1, 6.2, 6.3), and each component sleeve (63) of one retaining component (23, 24, 25) is aligned with the component sleeve (63) of another retaining component (23, 24, 25) for accommodating the corresponding input line terminal (6.1, 6.2, 6.3), and is aligned with the corresponding window recess (56, 57, 58) of another retaining component (23, 24, 25).

10. The coupling unit (5) according to any one of claims 5 to 9, characterized in that The bottom bridge (31) is constructed to be thinner laterally in the area of ​​the window recess (56, 57, 58), so that the lower edge of the window recess is essentially aligned with the corresponding upper side of the lateral area of ​​the bottom bridge (31), and the bottom bridge (31) has an elevated central area in the area of ​​the window recess (56, 57, 58) for placing corresponding connecting lines (26, 27, 28).

11. A three-phase electric machine, comprising at least six excitation coils (3.1, 3.2, 3.3), a stator laminated core (2), a main axis (A) and a coupling unit (5) according to any one of claims 1 to 10, wherein the excitation coils (3.1, 3.2, 3.3) each have an input line end (6.1, 6.2, 6.3) and an output line end (7), and wherein, The supply line ends (6.1, 6.2, 6.3) are connected to respectively associated connecting lines (26, 27, 28) in the region of a first end side (14) of the stator laminated core (2).

12. The three-phase motor with star connection according to claim 11, characterized in that: The output line ends (7) are electrically connected to each other by means of a fourth connecting wire (66) which is encircled in an annular shape, and the fourth connecting wire (66) is inserted into a non-conductive fourth holding component (64) which imitates the annular shape from an open side or an openable side of at least one receiving portion (67) of the fourth holding component (66), wherein the fourth holding component (64) has at least one receiving portion (67) which is open on at least one side or can be opened on at least one side, so that the fourth connecting wire (66) is held at a parallel distance from the second end side (15) of the stator laminated core (2), and wherein: The fourth holding component (64) has a recess (68) arranged overlapping with the corresponding output line end (7), so that free access is achieved for placing welding tongs to weld the fourth connecting line (66) and the corresponding output line end (7).

13. The three-phase motor according to any one of claims 11 or 12, characterized in that: The excitation coil (3.1, 3.2, 3.3) is arranged on an insulator (4) surrounding the stator teeth (8) of the stator laminated core (2), and the insulator (4) has a fastening device (16) on the outer circumference in an annular shape and protruding beyond the first end side (14) of the stator laminated core (2), and the connecting ring (19) of the connecting unit (5) is located on the fastening device, whereby the insulator (4) is connected to the connecting ring (19), and / or the insulator (4) has a shaft ring protruding beyond the second end side (15) of the stator laminated core (2), which constructs the fourth retaining component (64).

14. The three-phase motor according to claim 13, characterized in that: The receiving portion (67) of the fourth retaining component (64) has a bottom bridging portion (71) and two bridging portion-shaped side walls (72, 73) arranged at a certain distance from each other, the outer side wall (72) and the bottom bridging portion (71) are respectively interrupted in the area of ​​the output line end (7) for constructing a recess (68), and a component notch (70) aligned with the recess (68) is provided on the inner side wall (73), and the protruding end of the corresponding output line end (7) is bent into the component notch (68), wherein the bent end of the corresponding output line end (7) placed on the fourth connecting line (66) is connected to the fourth connecting line (66) in the area of ​​the recess (68) and the component notch (70).

15. Use of at least two holding assemblies (23, 24, 25) for producing a coupling unit (5) according to any one of claims 1 to 10, characterized in that The retaining components (23, 24, 25) each imitating a ring shape are constructed as plug / lock modules that can be stacked at least in a specific order and can be connected to each other, and are respectively provided with at least one receiving portion (29, 35, 38) that is preferably open on at least one side or can be opened on at least one side, and the connecting line (26, 27, 28) can be inserted into the receiving portion (29, 35, 38) of at least one of the retaining components (23, 24, 25) in a state separated from at least one other retaining component (23, 24, 25), and then at least two retaining components (23, 24, 25) are plugged / locked to each other.

Images