DE102017219861A1 - An insulation displacement connection as well as a stator for an electrical machine and an electrical machine comprising an insulation displacement connection and method for producing such a stator - Google Patents

Abstract

Cutting-clamping connection (20), in particular for the electrical contacting of wires (22) in an electrical machine (12), and a stator (10) for an electric machine (12) and an electric machine (12) a gabel-shaped insulation displacement element (70) having two free legs (21) on whose inner sides cutting edges (71) for contacting the wire (22) are integrally formed, wherein the free legs (21) transversely to an insertion direction (3) are movably formed on the cutting-clamping element (70), and when inserted into a receiving pocket (46) for the insulation displacement element (70) transversely to the insertion (3) are moved towards each other, such that the movable free limbs (21) with their cutting edges (71) cut into a surface (23) of the wire (22) inserted in the receiving pocket (46) in an electrically contacting manner. The invention also relates to a method for producing such a stator (10).

Description

The invention relates to an insulation displacement connection, as well as a stator for an electrical machine and an electrical machine comprising an insulation displacement connection and a method for producing such a stator according to the preamble of the independent claims.

State of the art

With DE 10 2008 054 529 A1, a stator of an electric machine has become known, in which individual stator segments are assembled to form an annular stator base body. On the individual stator segments, an insulation mask is arranged, on which individual coils are wound whose wire ends are inserted in receiving pockets in the insulation mask. For electrical contacting of the coils, cutting-clamping elements engage axially in the receiving pockets and jam with the wire ends. The insulation displacement elements are integrally formed here on conductor rings of a connection plate, which is placed axially on the wound stator base body. The geometric dimensions of the insulation displacement elements and the receiving pockets are exactly matched to the diameter of the winding wire in order to reliably contact it electrically. In order to adapt such an electric machine to different power ranges, there is a demand that the diameter of the winding wire should be changed. For this purpose, the geometry of the conductor rings of the circuit board and the design of the insulation mask with the receiving pockets must be changed for each power range, which represents a very large constructive and cost-intensive effort. These disadvantages are to be remedied by the solution according to the invention.

Disclosure of the invention

Advantages of the invention

The devices of the invention and the method according to the invention with the features of the independent claims have the advantage that can be used for contacting different wire thicknesses by the formation of flexible, free legs on the forked end of the insulation displacement elements. For this purpose, when inserting into the receiving pockets, the free legs are bent in such a way that, even with different wire diameters in the receiving pocket, they are always adjusted and pressed against the wire surface with a sufficient contact pressure. Thus, a reliable electrical contact is always produced when inserting the constant insulation displacement elements in the same receiving pockets even at different thicknesses of the wires, without a modification of the wiring plate or the insulating mask is necessary. As a result, such an insulation displacement connection can be universally used as a standard component, without having to adapt other components to the different wire thicknesses.

The measures listed in the dependent claims make possible advantageous developments and improvements of the embodiments specified in the independent claims. In order to mold the free legs movable to the insulation displacement element, the free legs are connected by means of thin webs with the main body of the insulation displacement element. The insulation displacement element is formed for example as a metal sheet whose thickness in the wire direction is significantly lower than the areal dimension across the wire. The width of the thin webs is formed thinner, in particular in the sheet plane transverse to the wire, as the width of the free legs transversely to the wire direction. This ensures that the free legs are made more stable than the thin webs with which the free legs are connected to the insulation displacement element. As a result, the thin webs form a kind of pivot around which the two free legs can be bent towards each other. In this case, the two free legs, which are arranged in a fork shape to each other, on their inner sides cutting edges, with which they can cut into the surface of a - preferably round - wire. The free legs are preferably rectilinear and, when inserted into the corresponding receiving pocket, are not bent in themselves, but are preferably turned toward one another by an angle only in the area of the thin webs. As a result, depending on the insertion depth of the insulation displacement element into the receiving pocket, the angle between the two free arms - and thus also the clear width between the two free legs - can be varied during insertion. As a result of this rotationally movable connection of the two free legs to the insulation displacement element, wires of different diameters can be electrically contacted by the free limbs.

The thin webs can be produced very cheaply by recesses in the insulation displacement element manufacturing technology. The recesses are arranged in the region of the clamping base of the fork-shaped free legs such that the material in the region of the connection of the free legs to the insulation displacement elements is weakened such that a thin web is formed here. This web then forms a kind of movable joint between the free leg and the main body of the cutting-clamp element.

In this case, the recesses are designed as edge-open recesses which lie opposite each other in the plane transverse to the wire axis. The recesses are, for example, semicircular and extend so close to the fork-shaped clamping base that the distance between the cutout and the clamping base form the thin web for flexible connection of the free leg. Alternatively, however, the recesses can also take on a different shape as long as their distance from the clamping base is small enough to ensure the flexibility of the thin webs formed thereby.

Particularly cost-effective, the insulation displacement element can be made of an electrically conductive metal sheet. In this case, the insulation displacement element can be punched in one piece from the metal sheet. The thickness in the longitudinal direction of the wire is thereby given by the sheet thickness. The extension across the wire direction is determined by the punching method. In this case, the fork-shaped free legs are punched out at the bottom for contacting the wire. At the opposite upper end, the insulation displacement element has a connection region via which the electric current is supplied or removed.

This connection region can be designed, for example, as a contact tongue, to which a corresponding conductor can be welded or soldered. The connection region can also be designed as a connection pin, which can be inserted directly into a corresponding electrically conductive sleeve. For example, such a contact pin can be plugged directly into a corresponding opening in an electrical circuit board - either as a press-in contact or soldered to the tracks of the circuit board. I

In a further embodiment, the connection region can also be integrally connected to a conductor element which is, for example, part of an interconnecting plate for controlling electrical coils of an electrical machine. Such an electrical conductor can extend, for example, in the same plane as the metal sheet of the insulation displacement element, or the insulation displacement element can be bent as a stamped bent part at an angle from an electrical conductor. It is particularly advantageous if several insulation displacement elements are integrally formed on an annular electrical conductor, which simultaneously contacts a plurality of coils of an electrical machine.

The clamping base between the two forked free legs arranged to each other is preferably arcuate, so that it rests semi-circularly after insertion into the corresponding receiving pocket on the circumference of a round wire. In order to form a reliable electrical contact, a cutting edge is preferably also formed on the clamping base, which cuts into the latter over the circumference of the surface of the wire. In such an embodiment, the insulation displacement element is always pressed into the receiving pocket in the insertion direction until the clamping base abuts directly against the wire, or until the cutting edge intersects the wire in the clamping base. Depending on the wire diameter used, the insulation displacement element is inserted more or less deeply into the identical receiving pocket.

For secure fixation of the insulation displacement element in the receiving pocket locking elements are formed on the insulation displacement element, which clamp when inserted into the receiving pocket on the inner walls. Such snap-in elements can be punched out of the metal sheet as snap-in hooks, which then dig into the plastic wall of the receiving pocket. In this case, at least two latching hooks lying transversely to the insertion direction are preferably formed. Optionally, however, it is also possible to punch out a so-called fir tree geometry, which completely dips into the receiving pocket. The locking elements are arranged with respect to the insertion direction above the recesses, so that when inserting the fork contact the free legs can close around the wire. After the fork contact has been completely inserted, the insulation displacement element is secured against falling out of the reception pocket by means of the latching hooks.

The insulation displacement connection according to the invention is formed in that an electrical wire is inserted into a receiving pocket, and then the cutting-clamping element is inserted into the receiving pocket. As a result, on the one hand, the wire is fixed mechanically firmly in the receiving pocket and, on the other hand, it is simultaneously contacted electrically with the insulation displacement element. For this purpose, the receiving pocket has two spaced-apart pocket walls, between which the flat cutting-clamping element is inserted. Therefore, the distance between these two pocket walls is at least as large as the sheet thickness of the insulation displacement element. The wire is inserted with its longitudinal direction transversely to these two pocket walls in the receiving pocket. For this purpose, the two pocket walls each have slots which extend from the upper open edge of the receiving pocket in the insertion direction to a slot bottom.

The wire is inserted all the way to the bottom of the slot, completely penetrating both pocket walls.

Within the receiving pocket a guide for the free legs is formed in the region of the sheet thickness in the longitudinal direction of the wire, which ensures that when inserting the insulation displacement element in the receiving pocket, the two free legs are moved towards each other. The mutually pioneering outer sides of the respective free legs slide along this guide of the receiving pocket until the cutting edges on the respective inner sides of the free legs cut into the inserted wire. The guide in each case has a bevel, so that the clear width between the two free legs is reduced as a function of the insertion depth of the insulation displacement element into the receiving pocket. The two opposite guide surfaces act like a funnel, in which the two movably arranged free legs are moved towards each other when pressed.

It when the guide is formed within the receiving pocket as a cone, or as a section through a cone, which preferably has a straight guide surface is particularly advantageous. This advantageously results in a linear relationship between the insertion depth of the insulation displacement element in the receiving pocket and the clear width between the free ends of the two free limbs. When the insulation displacement element is fully inserted into the receiving pocket, the clearance at the free ends of the free arms is less than the wire diameter. As a result, the free legs with respect to the insertion direction form a kind of undercut with the wire. The guide is designed as well as the slot width in the pocket walls for a maximum wire diameter. When using thinner wires, the lateral guide still reliably presses the free legs into the wire surface. Preferably, the free legs are not only elastically deformed, but also plastic, so that the bent around the wire around free leg remain dimensionally stable.

Such an insulation displacement connection according to the invention is ideally suited for the contacting of electrical coils in an electrical machine. In this case, the receiving pockets can be formed, for example, in an insulating mask of the stator teeth. In this case, the insulating mask can be designed both for single-tooth segments or for a stator closed in a ring shape. At the same time, the insulating mask serves as a guide element for the winding wire. In such an embodiment, the insulation displacement elements are advantageously part of a wiring plate of the stator, via which the electrical coils are driven. In this case, the insulation displacement elements can be formed in one piece with conductor elements which are inserted into the circuit board. Alternatively, the insulation displacement elements can be designed as separate components, which are subsequently connected to the conductors. The conductors are preferably part of an electronic unit of the electrical machine which serves to drive them. Depending on the interconnection of the coils, a separate receiving pocket for each wire end can be formed for each of the two wire ends of a coil, which pocket is in each case contacted by means of a separate insulation displacement element. Alternatively, however, the winding can also be wound through a plurality of stator teeth by means of a continuous winding wire and only one receiving pocket can be formed between two stator teeth, into which the connecting wire is inserted between two wound-through coils. In this embodiment, the electrical contact is tapped in each case by means of an insulation displacement connection between two coils in order to interconnect the individual coils accordingly.

The insulation displacement connection according to the invention is particularly advantageous for producing a stator which can be wound with wires of different thicknesses. By using different wire thicknesses, it is possible, for example, to achieve different winding concepts or different power ranges of an electrical machine, without the basic geometric concept of the stator having to be changed. In this case, with different variations of the stator, the differently thick winding wires can be inserted into the identical receiving pockets of the insulating mask. Similarly, identical insulation displacement elements can be used for the different wire thicknesses that are pressed into the receiving pockets. The flexible adaptation of the free legs, which are bent around the respective wires, a reliable electrical contact is achieved by the insulation displacement connection for different wire thicknesses. By using the identical receiving pockets and the identical insulation displacement elements, it is possible to dispense with a structural change of the stator design, whereby a cost-effective modular concept for the production of the stators can be realized.

list of figures

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description.

• 1 eine Ansicht eines Schneid-Klemm-Elements, das in eine Aufnahmetasche eingefügt wird,
• 2 und 3 zwei gefügte Schneid-Klemm-Verbindungen mit unterschiedlich dicken Drähten,
• 4 das Aufsetzen einer Verschalteplatte mit Schneid-Klemm- Elementen auf einen bewickelten Stator mit Aufnahmetaschen.

Show it:

• 1 a view of an insulation displacement element, which is inserted into a receiving pocket,
• 2 and 3 two joined insulation displacement connections with different thicknesses of wires,
• 4 the placement of a Verschalteplatte with insulation displacement elements on a wound stator with receiving pockets.

In 1 is a cutting-clamp element 70 which is suitable for insertion for insertion into a corresponding receiving pocket 46 into which an electrically conductive wire 22 is inserted. The insulation displacement element 70 is punched out in the embodiment of an electrically conductive sheet, for example, copper, a copper alloy or iron. The lower area of the insulation displacement element 70 is fork-shaped, and has two free legs 21 on that over a clamping reason 25 connected to each other. Adjacent to this clamping reason 25 are on both side edges 27 of the insulation displacement element 70 recesses 75 formed so that the material in the area of the clamping reason 25 so reduced is that the free legs 21 only over narrow bridges 24 on the insulation displacement element 70 are connected. As a result, the two free legs 21 within the sheet plane transverse to the insertion direction 3 movably formed. The narrow bridges 24 form a sort of hinge, so to speak, with which the free thighs 21 can be moved towards each other. On the insides 28 the free thigh 21 are cutting edges 71 molded, resulting in a surface 23 of the wire 22 can cut. This version is also in the clamping base 25 another cutting edge 65 molded, which also in the surface 23 of the wire 22 can be pressed. The clamping reason 25 is, for example, arc-shaped, so that the clamping base 25 in fully inserted state of the insulation displacement element 70 on the circumference of the wire 22 is present, or cuts into it. The wire 22 is formed, for example, as enamelled copper wire, wherein the cutting edges 71 penetrate the paint. The inner lines 28 and the outside 77 the free leg are for example as a straight line 29 formed, being at the free ends 31 the free thigh 21 Introductory inclines 32 are formed. The recesses 75 are above the thin webs 24 , facing each other, and to the outer edges 27 openly trained. For example, the recesses 75 semicircular, so that the thin webs 24 a range of minimum width 35 respectively. By such a constriction of the webs 24 creates a defined pivot point around which the free legs 21 are rotatably movable. Alternatively, the webs 24 also have a region with a constant small width, so that they are flexible over a greater extent. Above the recesses 75 are on the outer edges 27 locking lugs 72 molded, with which the insulation displacement element 70 in the receiving bag 46 can get stuck. The locking lugs 72 can be designed as a kind of hook or as Tannbaumgeometrie, which is an independent release of the insulation displacement element 70 in the storage bag 46 prevent. Above the catch noses 72 (contrary to the insertion direction 3 ) is on the insulation displacement element 70 a connection area 74 formed on which an electrical conductor 84 an electric machine 12 contacted (not shown). Such a connection area 74 can be used as a welding or soldering strap 78 be educated. Alternatively, the connection area 74 as connection pin 79 be formed, which can be inserted directly into a pin-receiving, for example a printed circuit board. In a further alternative according to 4 is the connection area 74 integral with the conductor 84 - For example, a wiring plate 52 - connected.

The receiving bag 46 has a first pocket wall 61 and a second pocket wall 62 on, which are arranged approximately parallel to each other. Between these two bag walls 61 . 63 becomes the insulation displacement element 70 in the insertion direction 3 inserted, wherein the sheet metal plane of the insulation displacement element 70 also approximately parallel to the pocket walls 61 . 62 runs. Here is the receiving bag 46 upwards against the insertion direction 3 openly trained. In both bag walls 61 . 62 is an axial slot 63 in insertion direction 3 formed, in which the wire 22 with its longitudinal direction 19 across the pocket walls 61 . 62 is inserted. In 1 is the front second pocket wall 62 shown broken, so that the interior 47 the pocket 46 can recognize better. The axial slots 63 the storage bag 46 are dimensioned such that a wire 22 with maximum desired wire diameter 18 in the axial slot 63 can be inserted. This can of course also wires 22 with a smaller diameter 18 in the axial slot 63 be inserted. The wire 22 lies on a slotted ground 64 of the slot 63 on, a stop for the wire 22 forms when the insulation displacement element 70 with its forked end 76 over the wire 22 is pushed. Here are the free thighs 21 with their insertion bevels 32 from above a the interior 47 the receiving bag 46 plugged in. Between the two bag walls 61 and 63 are on both sides slide tours 48 formed, where the free legs 21 with their outsides 77 in the receiving bag 46 slide into. In the exemplary embodiment, the slotted guides 48 in the lower area in each case a slope on which the bottom of the bag 49 towards a narrowing funnel 45 form. Thereby be the two free thighs 21 during insertion in insertion direction 3 moved towards each other, so that the cutting edges 71 into the surface 23 of the wire 22 incise. Due to the funnel-shaped or cone-shaped design of the slide guide 48 the fork adapts 76 to the diameter 18 of the wire 22 on. This will make the free legs 21 with a wire 22 with a smaller diameter 18 continue to move towards each other, so that the clear width 16 between the two free legs with a smaller wire diameter 18 smaller than a larger diameter wire 18 ,

In the embodiment, the slot bottom 64 on which the wire 22 is located between the two pocket walls 61 . 62 in the longitudinal direction of the wire 18 formed throughout. This is laterally from the slot bottom 64 to the two slide tours 48 one channel each 53 trained, in which the free thighs 21 in the insertion direction 3 be inserted. These channels 53 are to the slide tours 48 formed so wide that the free thighs 21 for all wire diameters used 18 can be moved far enough toward the wire to provide a reliable insulation displacement connection 20 with the wire 22 train.

The 2 shows a completely inserted insulation displacement element 70 in which a wire 22 with a large diameter 18 is contacted. Due to the large wire diameter 18 are the two free thighs 21 not so strongly moved towards each other. The easy distance 16 between the free ends 16 is larger than with the insulation displacement connection 20 with a smaller wire diameter 18 in 3 , It can be seen that the insulation displacement element 70 not quite on the pocket bottom 49 but a space between the pocket bottom 49 and the free ends 31 is trained. This is also the locking lugs 72 not very far into the interior 47 the receiving bag 46 are inserted.

For comparison, in 3 an insulation displacement connection 20 with a wire 22 with a smaller diameter 18 shown. In this embodiment, the insulation displacement element 70 in the insertion direction 3 deeper into the receiving bag 46 introduced, so that, for example, the free ends 31 to the bottom of the bag 49 rich. This means that the free thighs 21 have been moved against each other maximum, and thus this receiving pocket leads 46 a wire 22 with the smallest possible diameter 18 to contact. Because in 3 the identical insulation displacement element 70 is used, this deeper into the receiving pocket 46 in the insertion direction 3 is plugged in, are also the locking lugs 72 deeper in the interior 47 arranged. Despite different wire diameters 18 lie with both insulation displacement connections 20 the free thighs 21 with their cutting edges 71 reliable on the wire 22 so that these in the surface 23 incise. The free thighs 21 are over the thin webs 24 movable on the insulation displacement element 20 molded, so that in 3 due to the lower insertion of the insulation displacement element 20 the free thighs 21 on the slide tour 48 are more tilted than in 2 , Here is the open gate 76 like a pair of pliers with the thinner wire diameter 18 closed more strongly, (and the free ends 31 a smaller clear width 16 to each other) as in the embodiment according to 2 with the larger wire diameter 18 , This can be done with identical components of the insulation displacement element 70 and the receiving bag 46 different wire diameters 18 with a reliable insulation displacement connection 20 be contacted. In figure 3 is at the connection area 74 a plug-in pin 79 formed, which can be plugged directly into a circuit board, for example. This can be the plug-in pin 79 an elastically deformable eyelet 119 so that optional on the soldering of the plug-in pins 79 can be waived. In 4 is the slot reason 64 along the longitudinal direction 19 of the wire 22 not formed continuously, but only at the points where the wire passes through the pocket walls 61 . 62 through third. As a result, there are no separate channels 53 for the free thighs 21 designed so that they have more room to move towards each other.

In 4 is a further embodiment of an inventive electrical machine 12 shown at the stator teeth 14 a stator 10 are wound. In this embodiment, the stator 10 a stator base 34 which forms a closed ring on the radial stator teeth 14 are arranged. Between the stator teeth 14 are stator slots 13 formed by the the wire 22 of electric coils 17 runs. Before winding the stator 10 is on the stator body 34 an insulating mask 40 placed, which is preferably formed of insulating plastic as an injection molded part. In this insulating mask 40 here are receiving pockets 46 formed, in which the wire 22 the coils 17 is inserted. The first and second pocket walls are preferred 61 . 22 approximately in the tangential direction 5 of the stator ring, so that the wire 22 through the slots 63 through approximately in the radial direction 4 of the stator 10 runs. In this embodiment, the coils 17 with a continuous wire 22 successively wound and between two coils 17 through the receiving bag 46 guided. For electrical contacting of the coils 17 grip insulation displacement elements 70 attached to an electrical conductor element 84 are arranged in the axial direction 6 of the stator 10 into the pockets 46 on. The ladder elements 84 For example, are formed as annular conductor strips, where the insulation displacement elements 70 are integrally formed. The conductor strip 84 with the insulation displacement elements 70 is designed, for example, as a stamped bent part and into a circuit board 52 inserted axially on the stator base 34 is put on. These are on the insulating mask 40 Pins 80 formed, in the corresponding centering 81 the wiring board 52 intervention. The centering fixture 81 are for example as axial through holes 82 formed so that the free end of the centering pin 80 can be plastically deformed to the wiring plate 52 on the stator base 34 to fix. In the circuit board 52 are several conductor elements 84 arranged, each having an electrical phase 26 form several coils 17 electrically connected to each other. In the embodiment, three conductor strips 84 shown, here three phases 26 the electric machine 12 form. The free thighs 21 turn over the narrow bridges 24 with the insulation displacement element 70 connected so that the free legs in the tangential direction 5 are movably arranged. In 4 has an insulation displacement element 70 by way of example schematically another form of a further embodiment variant, wherein preferably all cutting-clamping elements 70 a circuit board 52 are identical. In this variant, the recesses 75 formed angular, so that the webs 24 approximately as a punctiform joint of the free legs 21 are formed. The receiving pockets 46 and the insulation displacement elements 70 are for wires 22 a minimum and a maximum diameter 18 interpreted, with the identical insulation displacement elements 70 and identical receiving pockets 46 different thickness wires 22 can be contacted by the free legs by means of the slotted guide 48 accordingly strong around the wire 22 in the receiving bag 46 around turn.

On the right side, below is a storage bag 46 shown in section, with the distance 68 between the two bag walls 61 . 62 about the sheet thickness 68 of the insulation displacement element 70 equivalent. At the upper opening of the storage bag 46 is a joining aid 51 molded, which is the insulation displacement element 70 when inserting with respect to the radial direction 4 and in particular also with respect to the tangential direction 5 centered.

In an alternative - not shown - execution of the stator 10 also be composed of so-called single tooth segments, in which each individual stator tooth 14 a single insulating mask 14 having. In this case, for example, for each stator tooth 14 two receiving pockets 46 in the insulating mask 40 be formed to each of the wire beginning and the wire end of a single coil 17 take. In this version, the circuit board has 52 for each coil 17 according to two insulation displacement elements 70 on to every single coil 17 to contact electrically. In a further alternative design, the insulation displacement elements are 70 not in one piece with an electrical conductor 84 formed the Verschaltungsplatte, but formed as a separate components. In the process, the inserted insulation displacement elements become 70 at their connection areas 74 by a plug connection or by welding or by soldering with electrical conductor elements 84 which are the coils 17 connect electrically accordingly.

It should be noted that with regard to the exemplary embodiments shown in the figures and in the description, a wide variety of possible combinations of the individual features are possible with one another. Thus, for example, the concrete design of the insulation displacement elements 70 and the receiving pockets 46 be varied. For example, the shape of the free legs 21 and the recesses 75 - And thereby the formation of thin webs 24 for moveable connection of the free legs 21 - as well as the corresponding link guide in the receiving pocket 46 to the requirements of the electrical machine 12 and their manufacturing capabilities are adjusted. By means of the inventive insulation displacement connection 20 can have different wire thicknesses 18 reliably contacted, so that, for example, for different interconnections on the same Statorgrundkörper 34 the identical insulation displacement elements 70 and identical receiving pockets 46 can be used. The invention is particularly suitable for the rotary drive of components - for example pumps - or for the adjustment of parts in the motor vehicle, but is not limited to this application.

Claims (15)

Cutting-clamping connection (20), in particular for the electrical contacting of wires (22) in an electrical machine (12), with a fork-shaped insulation displacement element (70) having two free legs (21) on whose inner sides cutting edges (71) for contacting the wire (22) are formed, characterized in that the free legs (21) are movable transversely to an insertion direction (3) on the insulation displacement element (70) are formed, and when inserted into a receiving pocket (46) for the insulation displacement element (70) transversely to the insertion direction (3) are moved towards each other, so that the movable free legs (21) with their cutting edges (71) in an upper surface (23) of the in the receiving pocket (46) inserted wire (22) cut electrically contacting. Insulation displacement connection (20), after Claim 1 , characterized in that the free legs (21) are connected via thin webs (24) with the insulation displacement element (70), wherein a width (35) of the webs (24) is less than one Width (36) of the free legs (21) transversely to the insertion direction (3) and transversely to the wire (22). Cutting-clamp connection (20) after Claim 1 or 2 , characterized in that the insulation displacement element (70) in the insertion direction (3) opposite to the free legs (21) has a connection region (74), and between the connection region (74) and The free legs (21) are formed with two recesses (75) opposite to the insertion direction (3), by means of which the thin, movable webs (24) are formed towards the free legs (21). Cutting-clamping connection (20) according to any one of the preceding claims, characterized in that the insulation displacement element (70) is punched out of a metal sheet and transversely to the wire (22) has larger dimensions gene than its sheet thickness (68) in the wire direction (19). Cutting-clamping connection (10) according to any one of the preceding claims, characterized in that the recesses (75) are punched in particular circular, so that the thin webs (24) form a fulcrum around which the free legs (21) are bent around the wire (22) when inserted into the receiving pocket (46). Cutting-clamping connection (20) according to one of the preceding claims, characterized in that between the two free legs (21) an arcuate clamping base (25) is formed, which also has a further cutting edge (65), in particular after the complete insertion of the insulation displacement element (70) in the receiving pocket (46) also cuts into the wire (22). Cutting-clamping connection (20) according to one of the preceding claims, characterized in that the connection region (74) is designed as a plug-in pin (79) or as a welding strap (78) or as a solder strap or as one piece a conductor element (84) - in particular a wiring plate (52) of the electrical machine (12) - is connected. Cutting-clamping connection (20) according to any one of the preceding claims, characterized in that between the connection region (74) and the free legs (21) opposite locking lugs (72) are integrally formed, which after insertion of the cutting Clamping element (70) on an inner side (50) of the receiving pocket (46) cling. Cutting-clamping connection (20) according to one of the preceding claims, characterized in that the receiving pocket (46) has a first pocket wall (61) and a second pocket wall (62) which are approximately parallel to each other and at least about a clear width of the sheet thickness (68) spaced from each other, wherein both pocket walls (61, 62) have a slot (63) in the insertion direction (3), which is in each case designed as a through hole, in which the wire (22) inserted is. Cutting-clamping connection (20) according to any one of the preceding claims, characterized in that formed within the receiving pocket (46) between the first pocket wall (61) and the second pocket wall (62) a ball guide (48) is, on the outer sides (77) of the free legs (21) when inserted into the receiving pocket (46) are guided such that deform the free legs (21) to bend around the inserted wire (22) and in this incise. Cutting-clamping connection (20) according to any one of the preceding claims, characterized in that the outer sides (77) of the free legs (21) - in particular straight - have portions (29) on a cone (45) of the slotted guide (48). Cutting-clamping connection (20) according to one of the preceding claims, characterized in that the slots (63) in the insertion direction (3) have a slot bottom (64) against which the wire (22) is connected with a first side. is located, and the arcuate clamping base (25) between the legs (21) at fully inserted cutting-clamping element (70) on the opposite side of the wire (22) is present - in particular cuts. Stator (10) for an electrical machine (12), comprising a stator base (34) having radial stator teeth (14) for receiving coils (17) of an electrical winding, and the coils (17) connected to the wire (22 ), wherein on an end face (39) of the stator main body (34) an insulating mask (40) with guide elements for the wire (22) is arranged, each coil (17) at least one receiving pocket (46) on the insulating mask (40). is assigned, in which the wire (22) for interconnecting the individual coils (17) is inserted, and in each case an insulation displacement element (70) is joined to the wire (22) in the receiving pocket (46). Electric machine (12) - in particular an electronically commutated electric motor - with at least one insulation displacement connection (20) according to one of the preceding claims, characterized in that for energizing the coils (17) an electronics unit is arranged and external connection Contacts of the electrical machine (12) by means of the at least one insulation displacement connection (20) with the coils (17) are connected. Method for producing a stator (10) according to one of the preceding claims, characterized by the following method steps: - an insulating mask (40) is axially joined to an end face (39) of the stator base body (34) - then the stator base body ( 34) with the wire (22) wound coils (17) arranged - of each coil (17), the wire (22) is guided radially through a receiving pocket (46) for a cutting-clamping element (70) - the insulation displacement Elements (70) are inserted with movably arranged free legs (21) in the axial direction (3) into the receiving pockets (46), the free legs (21) being bent towards the wire (22) so as to enter the wire (22). - and in particular the insulation displacement elements (70) on annular Lei terelemente (84) are formed, which are arranged in a Verschaltungsplatte (52) made of plastic, wherein the wiring plate (52) for energizing the coil (17) axially over the insulating mask (40) the Statorgrundkörper (34) is joined.

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