DE102018108615A1 - Finger element, positioning, positioning and positioning method for positioning at least one conductor end - Google Patents

Abstract

In order to make a machine process more reliable for manufacturing a component of an electrical machine, the invention provides an elongate finger element (26) for positioning a conductor end (12) or a group of conductor ends (12) of a conductor end arrangement (20) from a component (14 ) for forming a member of an electric machine projecting conductor end (12), comprising: a driving member (32) for driving longitudinal movement of the finger member (26) in a forward direction and a backward direction, a frontward detection end (34) forwardly moved by forward movement of the finger Finger element (26) between the conductor ends (12) is retractable and on a peripheral portion has a radially to a longitudinal axis of the finger member (26) projecting detection area (36), and a transmission element of a transfer gear (30) for converting a central region or end portion of a longitudinal movement of the finger element (26) in V in a rotational movement of the detection end (34).

Description

The invention relates to an elongate finger element for positioning a conductor end or a group of conductor ends of a conductor end arrangement of conductor ends projecting from a component for forming a component of an electrical machine. The invention further relates to a positioning unit provided with such a finger element for positioning a conductor end or a group of conductor ends of a conductor end arrangement of conductor ends projecting from a component for forming a component of an electric machine. The invention further relates to a positioning device comprising one or more such positioning units for positioning a conductor end or a group of conductor ends of an annular conductor end arrangement of conductor ends projecting from a component for forming a component of an electrical machine. Furthermore, the invention relates to a use of such a finger element, such a positioning unit or such a positioning device for threading conductor ends in receiving openings of a positioning and clamping device. Finally, the invention relates to a method for positioning a conductor end or a group of conductor ends of a conductor end arrangement of conductor ends projecting from a component for forming a component of an electrical machine.

Electrical machines are understood in particular as machines for converting electrical energy into kinetic energy and machines for converting kinetic energy into electrical energy. In particular, these include electric motors and generators.

In the manufacture of components of such electrical machines, such as stators or rotors, it is often necessary to interconnect or otherwise work together ends of wires formed from wires, e.g. to cut or shape together.

For example, there are electric motors in which coil windings, in particular of the stator, are formed of different pieces of wire whose ends are then connected together. Devices have been proposed for joining wire ends of hairpins for forming stator windings of electrical machines, in which the wire ends are welded together. In this case, devices and methods for positioning and clamping the wire ends are provided prior to welding.

1. [1] DE 10 2018 103 926.3 ,
2. [2] DE 10 2018 103 929.8 und
3. [3] DE 10 2018 103 930.1 ,

auf die für weitere Einzelheiten ausdrücklich verwiesen wird, Vorrichtungen und Verfahren zum Umformen von Drahtenden von Hairpins und ein Herstellverfahren für ein Bauteil einer elektrischen Maschine unter Verwendung derselben beschrieben. Die in diesen früheren Patentanmeldungen beschriebenen Vorrichtungen und Verfahren dienen insbesondere zum Umformen der Hairpin-Drahtenden, die miteinander verbunden werden, um so Spulenwicklungen zu bilden. Das Verbinden erfolgt z.B. mittels Schweißen, wozu es vorteilhaft ist, in der deutschen Patentanmeldung

• [4] DE 10 2018 103 100.9 ,

auf die für weitere Einzelheiten ausdrücklich verwiesen wird, beschriebene und gezeigte Vorrichtungen und Verfahren zum Positionieren und Spannen der Hairpin-Drahtenden zu verwenden.For example, in the German patent applications

1. [1] DE 10 2018 103 926.3 .
2. [2] DE 10 2018 103 929.8 and
3. [3] DE 10 2018 103 930.1 .

to which reference is expressly made for further details, devices and methods for forming wire ends of hairpins and a method of manufacturing a component of an electrical machine using the same described. The devices and methods described in these earlier patent applications are particularly useful for reshaping the hairpin wire ends which are joined together to form coil windings. The bonding is carried out, for example by means of welding, for which it is advantageous in the German patent application

• [4] DE 10 2018 103 100.9 .

to which reference is expressly made for further details, to use and illustrated apparatus and methods for positioning and tensioning the hairpin wire ends.

Now, in practice, it may happen that the position of one or more of the wire ends deviates from a predetermined tolerance range according to the forming described in patent applications [1], [2] and [3], so that a placement of the in the [4] described positioning and clamping device is difficult. Aligning the conductor ends is difficult in such a situation due to the restricted space.

The invention has for its object to provide devices, uses and methods available with which a positioning of conductor ends under difficult space conditions is easily possible.

To achieve this object, the invention provides a finger element with the features of claim 1.

Advantageous uses of such a finger element and a corresponding positioning method are specified in the dependent claims.

Advantageous embodiments are the subject of the dependent claims.

• einem Antriebselement zum Antreiben einer Längsbewegung des Fingerelements in eine Vorwärtsrichtung und eine Rückwärtsrichtung,
• einem in Vorwärtsrichtung vorne angeordneten Erfassungsende, das durch die Vorwärtsbewegung des Fingerelements zwischen Leiterenden einfahrbar ist und an einem Umfangsbereich einen radial zu einer Längsachse des Fingerelements vorspringenden Erfassungsbereich aufweist, und
• einem Getriebeelement eines Umsetzgetriebes zum Umsetzen eines mittleren Bereichs oder Endbereichs einer Längsbewegung des Fingerelements in Vorwärtsrichtung in eine Drehbewegung des Erfassungsendes.

The invention, in one aspect thereof, provides an elongated finger element for positioning a conductor end or a group of conductor ends of a conductor end assembly of conductor ends projecting from a device for forming a component of an electrical machine, comprising:

• a drive member for driving longitudinal movement of the finger member in a forward direction and a backward direction,
• a forwardly arranged detection end, which is retractable by the forward movement of the finger element between conductor ends and at a peripheral region has a radially projecting to a longitudinal axis of the finger element detection area, and
• a gear member of a transfer gear for converting a middle portion or an end portion of a longitudinal movement of the finger member in the forward direction in a rotational movement of the detection end.

It is preferable that the detection area has one or more radial protrusions arranged in series to form a comb structure.

It is preferred that the transmission element is a control cam with a control cam or a cam follower for engaging a control cam.

It is preferred that the transmission element is an element of a slotted guide.

It is preferred that the finger element has a first sub-element with the drive element and a second sub-element with the detection end, wherein the sub-elements are movable relative to each other in the longitudinal direction of the finger element.

It is preferred that on one of the sub-elements, the transmission element is designed to cooperate with a stationary further transmission element of the transfer gear.

In an alternative it is provided that is formed on the sub-elements, the transfer gear for implementing a relative movement between the sub-elements in a rotational movement of the detection end.

It is preferred that the sub-elements are telescopically movable relative to each other.

It is preferred that one of the sub-elements has a sleeve portion and the other sub-element has a pin portion which is slidably received in the sleeve portion.

It is preferred that one of the sub-elements has a control cam or control link.

Alternatively it can be provided that one of the sub-elements has a cam follower element engaging on a control cam or a guide pin guided in a control cam.

In one alternative, it can be provided that one of the sub-elements has a control cam or control link and that the other of the sub-elements has a cam follower element acting on the control cam or a guide pin guided in the control link.

It is preferred that the sub-elements are rotationally fixed relative to each other. Thus, e.g. be provided on a first sub-element, the transmission element of the transfer gear, so that the first sub-element is rotated at the central region or the end portion of the longitudinal movement and relative to the - already retracted between conductor ends or the like - second sub-element is displaceable and the second sub-element by the rotatable connection rotates.

Alternatively it can be provided that the sub-elements are rotatable relative to each other about the longitudinal axis. This is particularly advantageous if the transfer gear acts between the sub-elements, so that a relative displacement of the sub-elements causes a rotation of the second sub-element when the first sub-element is not rotating.

It is preferred that the first sub-element has a storage area for longitudinally movable guiding in a holding device.

It is preferred that the first sub-element has as drive element a threaded rod or a rack or a rack area.

It is preferred that the first sub-element and the second sub-element is biased by a biasing means or a mechanical force storage in one of the relative directions of movement.

It is preferred that the first sub-element and the second sub-element is biased by a biasing means or a mechanical energy storage in the direction away from each other.

It is preferred that the first subelement or a subregion of the first subelement is articulated relative rotatably to the drive element.

According to a further aspect, the invention provides a positioning unit for positioning a conductor end or a group of conductor ends of a conductor end arrangement of conductor ends projecting from a component for forming a component of an electrical machine, having a finger element according to one of the preceding Embodiments, a holding device, in which the finger element is held longitudinally movable, and a co-operating with the drive element output element, which is designed to transmit a driving force to the drive element for driving the longitudinal movement.

It is preferred that the positioning unit is a finger element with a first subelement and a second subelement which is displaceable relative to the first subelement and has a stop against which one of the subelements can be moved in the course of the longitudinal movement.

It is preferred that a driven element embodied as a toothed wheel is designed to interact with the drive element designed as a toothed rack or toothed rack area.

It is preferred that a stationary gear element of the transfer gear cooperating with the gear element on the finger element is provided on the holding device.

It is preferred that the transfer gear is formed between the holding device and the finger element.

It is preferred that the finger element has a cam element with a control cam and that the holding device has a cam follower element which acts on the control cam.

Preferably, the control cam or the link control on a linear portion for allowing a portion of the longitudinal movement without rotation and a curved portion in which over a portion of the longitudinal movement in addition to the longitudinal movement and rotation of at least one partial element of the finger element is effected.

According to a further aspect, the invention provides a positioning device for positioning a conductor end or a group of conductor ends of an annular conductor end arrangement of conductor ends projecting from a component for forming a component of an electric machine, comprising: a holder which is annular or ring segment-shaped about a central axis, on which a Series of positioning units according to one of the preceding embodiments are formed such that the finger elements are designed to be directed radially to the central axis with the detection end on the central axis to.

It is preferred that the holder has a stationary part and a drive part rotatable relative thereto about the central axis and a gearbox for converting a rotational movement of the drive part into a drive movement of the finger elements.

It is preferred that the transmission has an internal toothing on the drive part, which meshes with gears acting as output elements of the positioning units.

It is preferred that the parts of the holder are disc-shaped and the positioning units are arranged therebetween.

It is preferred that the holder has guide recesses, guide grooves or guide bores running relative to the central axis for guiding the finger elements or of first partial elements and / or of second partial elements of the finger elements.

According to a further aspect, the invention provides a use of a finger element, a positioning unit or a positioning device according to one of the preceding embodiments for threading conductor ends in receiving openings of a positioning and clamping device for positioning and clamping the conductor ends for further processing and / or cutting and / or welding and / or connect. Preferably, a positioning and tensioning device is provided, as shown and described in the earlier patent application [4], to which reference is expressly made for further details.

In another aspect, the invention provides a method for positioning a conductor end or a group of conductor ends of a conductor end assembly of conductor ends projecting from a device for forming a component of an electric machine, comprising: longitudinally moving a finger element for retracting a detection end of the finger element that is at a peripheral region has at least one detection area projecting radially to the detection end, with a detection range aligned with the extension of the conductor ends between two conductor ends, and
Translating a central portion or an end portion of the longitudinal movement of the finger member into a rotational movement for rotating the detection end retracted between the conductor ends so as to detect and position the detection area of at least one of the conductor ends aligned transversely to the extension of the conductor ends.

Preferably, the method comprises: using the finger element according to one of the preceding embodiments and / or the positioning unit according to one of the preceding Embodiments or the positioning device according to one of the preceding embodiments.

Preferred embodiments of the invention relate to a mechanical positioning unit for aligning wire ends.

In particular, the positioning is to be used at one or in front of a station of a manufacturing plant for the manufacture of machine elements or components of electrical machines in mass production. Particularly preferably, the positioning unit for supporting a threading of wire ends in brackets or gauges for holding a larger number of wire ends for further processing such as particular cutting and / or bonding, in particular welding, be used. Examples of such a holder or such a teaching are described in the patent application [4], to which reference is expressly made for further details.

In particular, in experiments there has been the problem that wire ends of hairpins in the context of manufacturing a stator of an electric motor for use as a traction motor of vehicles after so-called entanglement, as e.g. are described and explained in [1] to [3], have not held the position due to the resilient behavior of the wire. In some experiments, the positional change of the wire ends was so dramatic due to the resilient behavior that threading into a welding jig shown in [4] failed.

One advantage of preferred embodiments is that a positioning and clamping device as described in [4] can be integrated more easily and reliably into a series process for the production of components of electrical machines.

An advantage of the invention and its advantageous embodiments is seen in a very small footprint in the axial direction relative to a central axis of the component and / or seen in the height direction. Thus, the elements, units, devices and devices described herein may be interposed between a housing from which project a group of conductor ends to be positioned and a fixture or jig.

For example, in one example of a manufacturing station for a Vorpositionieraufgabe, can be used for the embodiments of the invention, only a space height of 35 mm available.

In preferred embodiments of the positioning device, the drive functions via only a single actuator. Of course, other embodiments are possible in which a plurality of actuators are used.

Particularly preferred is a mechanism is created with the linear motion and then a rotational movement by the execution of a linear movement.

A small space height is preferably achieved with a backdrop-like mechanism that performs first a linear movement and then a rotating movement.

Preferably, the drive of the linear movement is formed by a toothed rack and pinion mechanism.

Preferably, a comb-like shape is formed at a detection end. The geometry of the detection end is predetermined in particular by the arrangement of the wire ends to be handled, in particular the number of wire ends per groove in the housing of the machine element.

Preferably, the elements, units and devices described herein are also applicable to components of electrical machines having multiple wire rows.

An advantage of preferred embodiments of the invention is that, in the manufacture of components of electrical machines having an array of many projecting wire ends which have been previously formed by bending, the concept of a cutting or welding jig, in particular that of [4 ], can be used reliably.

In particular, one of the devices described in [4] can be used to serve as a tensioning device for later processes.

Without the elements, units or devices presented herein, it would be more difficult to use such positioning and tensioning devices as welding templates or the like described in [4] in a fully automated process to ensure that each wire is in the correct position.

Preferably, the positioning device has a preferably annular arrangement of finger elements, which are provided with a rotating "comb" and a link mechanism and a rack. The rack meshes with an externally toothed gear. Each of the externally toothed gears meshes with an internally toothed external gear, which is formed on a drive ring, which is provided with at least one drive connection, such as a boom. A rotational movement of the internally toothed external gear causes a rotation of the externally toothed gears. This results in a linear movement of all racks inside.

Preferably, the comb is formed on a partial element of the finger element, which can be moved by the linear movement against a stop of the positioning unit. Another sub-element is provided with the rack as a drive element. The sub-elements are displaceable in the longitudinal movement direction to each other. Preferably, at least one driver for the rotational movement is formed on one of the sub-elements, which entrains the other sub-element during rotational movement. Preferably, a part of the transfer gear is formed on one of the sub-elements. The transfer gear is preferably formed as a link mechanism with a link (example of a cam) and a link engaging element (e.g., cam pin, example of a cam follower). De scenery is preferably formed in a sleeve portion of one of the sub-elements. The sleeve portion thus has a cam designed as a control cam and is an example of a control cam element.

Preferably, a compression spring is housed as a biasing member in the sleeve portion.

The link or other cam preferably has a longitudinally extending linear portion and a curved portion. The curved region preferably extends in the circumferential direction and in the longitudinal direction of the finger element.

In a preferred embodiment, the first linear movement is performed by the rotational movement of the internally toothed gear. The subelement or component of the finger element into which the detection area (e.g., the comb) is integrated then travels to the fixed stop. Preferably, the gate serves as positive guidance of the component, so that it is prevented that the detection range can rotate before the first linear movement is completed. Preferably, the detection area in this position is pushed forward (in particular radially inward) by a spring (for example the abovementioned compression spring) with a defined spring force. In a preferred embodiment, the at least one driver formed on the one sub-element - e.g. Driving pin - in this position at the end of a trained on the other sub-element slot (linear range of Kü l isse / control cam).

In the preferred embodiment, a further rotation of the internally toothed gear is then performed. This leads to a further linear movement of all racks inwards. In this second linear movement, additional rotation of the mechanism takes place via the gate so that the detection area (e.g., comb) pivots to a predefined pivot angle (e.g., an angle in the range of 45 ° to 135 °, preferably 90 °).

Preferably, by the rotational movement of the internally toothed gear, the second linear movement is performed. The subelement or component of the finger element into which the detection area, e.g. Comb, is integrated, stops on the fixed stop and turns it. The backdrop continues to serve as forced guidance of the sub-element, so that now takes place a combined linear and rotary motion. Preferably, in this position the sensing area is further urged forwardly (e.g., radially inwardly of the locator) by a spring (e.g., compression spring) of defined spring force. The detection area is then preferably pivoted in by the predefined pivoting angle (for example 90 °) via the at least one driver. In the end position is in the preferred embodiment of the driving pin at the front end of the slot. Although it is referred to as first and second linear motion, it should be understood that the overall motion is fluent over a single rotational movement of the drive member, i. z. B. the drive ring can be done with the internal gear.

A preferred application of the invention is pre-positioning of ends of hairpins in the manufacture of stators of electrical machines.

In one application, the hairpins are still engaged with the crotch crown as described and discussed in [1] to [3], and are then grasped by the preposition positioning device described herein.

For this purpose, the positioning device preferably has radially movable pin-shaped finger elements.

A special feature is the drive of the pin-shaped finger elements.

The drive in the radial direction is preferably carried out via a rotation of an outer ring plate with inner ring gear. This is driven per finger element a gear. This gear engages in a rack. This then gives the radial movement of the single finger element.

There are preferably a multiplicity of finger elements, for example more than 20, more particularly more than 40, present.

Preferably, the smallest possible axial space is taken.

A special feature is further a drive of a twist. The tips of the finger elements are provided with lateral teeth, which form a comb-like structure to capture the individual wire ends.

For this purpose, the protruding teeth are rotated accordingly at the end of the movement.

Preferably, each finger element is divided so that it has an axially displaceable outer part and thereon a sleeve or a cylindrical component is rotatably mounted. The rotation takes place around the radial orientation. A drive of the rotation is preferably carried out via a link. For this purpose, in each case a guide pin is preferably provided on a base plate. This cam pin engages in a backdrop which engages the outer shell of the cylindrical structure. This gate has a radially extending portion, an obliquely extending portion, and again a radially extending portion.

Next, there is a spring which urges the tip of the finger element against a stop radially inward.

In the movement, there is preferably a larger linear portion. This serves to drive the tip provided with a detection region, preferably with axially aligned teeth, between wire ends. At the end of the movement then the rotation takes place, so that the teeth of the detection area to the left and right of the wire end attack. The wire end is then held on one side by the tip, in the radial direction by the respective tooth and on the other side by the adjacent finger element and the adjacent tip located there.

So then the stator can be moved out of the Verschränkungskrone, yet the wire ends are still fixed in position by this device.

• 1 eine perspektivische Draufsicht auf eine Positioniervorrichtung zum Positionieren einer Gruppe von Leiterenden oder aller Leiterenden einer ringförmigen Leiterendenanordnung umfassend eine Halterung, an der eine Reihe von Positioniereinrichtungen vorgesehen sind, wobei die Positioniereinheiten jeweils mit einem länglichen Fingerelement versehen sind und sich in einer Grundstellung befinden; dabei sind zur Übersichtlichkeit nur drei der Fingerelemente dargestellt;
• 2 eine vergrößerte Ansicht aus 1;
• 3 die Ansicht aus 2 ohne eine zentrale Anschlagsanordnung;
• 4 eine vergrößerte, teils geschnittene Darstellung eines Details der Positioniervorrichtung in einer Zwischenstellung nach Ende einer ersten linearen Bewegung;
• 5 eine Darstellung vergleichbar mit der in 4 in einer Endstellung nach Durchführung einer ersten und einer zweiten linearen Bewegung;
• 6 eine Darstellung vergleichbar mit 1 der Positioniervorrichtung während des Gebrauchs an einem Bauelement zum Bilden eines Bauteils einer elektrischen Maschine mit der ringförmigen Leiterendenanordnung und den zu erfassenden Leiterenden, wobei zur Übersichtlichkeit nur drei der Fingerelemente dargestellt sind und wobei sich die Fingerelemente in der Zwischenstellung gemäß 4 befinden;
• 7 eine Vergrößerung eines Details aus 6;
• 8 die Situation aus 7 aus einer anderen Perspektive rechts von oben in 7 gesehen;
• 9 die Darstellung gemäß 6, wobei sich die Fingerelemente in der Endposition gemäß 5 befinden;
• 10 ein vergrößertes Detail der drei dargestellten Fingerelemente aus 9 in der Endstellung;
• 11 das Detail aus 10 in einer anderen Perspektive von oben rechts in 10 gesehen; und
• 12 eine schematisierte Draufsicht auf ein Fingerelement gemäß einer weiteren Ausführungsform.

An embodiment will be explained in more detail below with reference to the accompanying drawings. It shows:

• 1 a top perspective view of a positioning device for positioning a group of conductor ends or all conductor ends of an annular conductor end assembly comprising a holder on which a series of positioning means are provided, wherein the positioning units are each provided with an elongated finger element and are in a normal position; only three of the finger elements are shown for clarity;
• 2 an enlarged view 1 ;
• 3 the view 2 without a central stop arrangement;
• 4 an enlarged, partially sectional view of a detail of the positioning device in an intermediate position after the end of a first linear movement;
• 5 a representation comparable to the one in 4 in an end position after performing a first and a second linear movement;
• 6 a representation comparable to 1 the positioning device during use on a component for forming a component of an electrical machine with the annular conductor end arrangement and the conductor ends to be detected, wherein for clarity only three of the finger elements are shown and wherein the finger elements in the intermediate position according to 4 are located;
• 7 an enlargement of a detail 6 ;
• 8th the situation 7 from a different perspective right from the top in 7 seen;
• 9 the representation according to 6 , wherein the finger elements in the end position according to 5 are located;
• 10 an enlarged detail of the three finger elements shown 9 in the final position;
• 11 the detail 10 in a different perspective from the top right in 10 seen; and
• 12 a schematic plan view of a finger element according to another embodiment.

In the 1 to 11 is a first embodiment of a positioning device 10 shown in different positions. The positioning device 10 serves to position conductor ends 12 the one of a component 14 protrude to form a component of an electrical machine.

For example, the device 14 a preliminary stage for forming a stator of an electric motor, which is designed as a traction motor for an electric vehicle and, for example, has a rated power in the range of 20 kW to 400 kW.

The component 14 has, for example, an annular housing 16 with grooves 18 on the inside of the case 16 are trained and in which wire segments are taken up by hairpin-shaped conductors (so-called hairpins), so that the ends thereof as conductor ends 12 out of the grooves 18 protrude.

The manufacture of the device 14 is as described and shown in the earlier patent applications [1] to [3], to which reference is expressly made for further details.

Accordingly, stand per groove 18 several, here for example four, leaders 12 out. These leaders ends 12 For example, as described and shown in [1] to [3], they have been bent radially and circumferentially, and are now to be connected to each other in pairs, for example, welded so as to form windings of phases of the stator of the electric motor.

For this purpose, a positioning and tensioning device as described and shown in the earlier patent application [4], which is expressly referred to for more details to be placed.

The positioning device 10 serves to pre-position the conductor ends 12 the annular conductor end assembly 20 the one out of the grooves 18 protruding conductor ends 12 ,

The positioning device 10 so should between the case 16 and the positioning and clamping device to be used, for example, as a welding jig of the type described in [4] and thereby coping with the smallest possible space height.

The positioning device has a holder 22 on. The holder 22 is annular around a central axis. For example, the holder 22 a base plate 96 on.

Annularly distributed around the central axis are on the bracket 22 a series of positioning units 24 provided, each having an elongated finger element 26 and a holding device 28 for the finger element 26 exhibit. The holding device 28 is for example by one of the respective positioning unit 24 assignable area of the bracket 22 educated. For example, the holding device 28 a plurality of spaced apart guide units 82 . 84 for movably guiding the associated finger element 26 on. The holding device 28 is for example by a combination of a segmental region of the base plate 96 with a first guide unit formed or fixed thereto 82 and a second guide unit formed or fixed thereto 84 educated.

The number of positioning units 24 and thus the finger elements 26 depends, for example, on the number of slots 18 in the case. In one embodiment 54 Positioning units and thus 54 Finger elements provided.

In the figures, for better clarity, only three of the finger elements 26 shown.

Each positioning unit 24 further shows a transfer gear 30 for converting at least a portion of a longitudinal movement of the finger element 26 in a rotary motion.

The following is the exemplary structure of the finger elements 26 described in more detail.

The finger element 26 has a drive element 32 for driving a longitudinal movement of the finger element directed radially to the central axis 26 in a forward direction (radially inward) and in a backward direction (radially outward) and a frontward forward detection end 34 on, by the forward movement of the finger element 26 is insertable between leader ends. At a peripheral portion of the detection end 34 is a radial to the longitudinal axis of the finger element 26 projecting detection area 36 , intended.

How best of the 3 and 12 can be seen, is the end of detection 34 formed as a tip and / or cone-shaped. The coverage area 36 has an array of a plurality of projections or teeth with spaces therebetween for receiving one conductor end each 12 serve. That's the coverage 36 comb-shaped. The number of teeth or protrusions of the comb structure thus formed 38 depends on the number of per finger element 26 to be positioned conductor ends 12 and, for example, the number of conductors per slot 18 , Depending on the type of positioning more or fewer projections may be provided; Also, in one embodiment, the detection range 36 only be formed by a single projection, for example, a conductor end 12 detected laterally.

In the illustrated embodiments, each finger element 26 a first subelement 40 and a second subelement 42 on.

The subelements 40 . 42 are in the longitudinal direction of the finger element 26 telescopically displaceable relative to each other.

The first subelement 40 is with the drive element 32 Mistake. The drive element 32 is for example as a rack 44 formed or has a rack 44 on. Next, the first sub-element 40 in the illustrated embodiments, a sleeve portion 46 on.

In the in the 1 to 11 shown first embodiment is between the sleeve portion 46 and the drive element 32 with the rack 44 a hinge 48 educated. Such is the sleeve area 46 relative to the rack 44 around the longitudinal axis of the finger element relative to the drive element 32 rotatable, but is in the longitudinal direction of movement of the rack 44 set, allowing a movement of the rack 44 in the longitudinal direction of the finger element 26 a forward movement or backward movement of the sleeve portion 46 causes. At the sleeve area 46 is a first transmission element 50 of the transfer gear 30 educated.

The transfer gear 30 can be designed quite differently, as long as it fulfills the function that at least part of the longitudinal movement of the finger element 26 in a rotational movement of at least a portion of a finger element 26 is converted.

In a preferred embodiment takes place in the transfer gear 30 a conversion of a longitudinal movement range in a rotational movement by means of a control cam 52 and one along the control curve 52 to be traversed cam element 54 ,

For example, to form the transfer gear 30 a backdrop tour 56 with a backdrop as a control curve 52 and a backdrop pin leading to the backdrop 58 as a cam follower element 54 educated.

More general is the control curve 52 on a cam element 60 formed, which is a first transmission element 50 forms of the transfer gear, wherein the on the control cam 52 along to be traversed cam element 54 a second transmission element 62 of the transfer gear 30 forms. The sleeve area 46 is an example of a cam element 60 , This can be designed quite differently in other examples.

In the in the 1 to 11 shown first embodiment is one of the transmission elements 50 . 62 of the transfer gear 30 on the finger element 26 , in particular on the first sub-element 40 provided while the other of the transmission elements 50 . 62 on the holding device 28 is provided.

Particularly preferred is the sleeve area 46 as a cam element 60 trained, the scenery 55 as a recess in the sleeve area 46 is incorporated. The scenery pin 58 is preferred as a stationary second gear element 62 stationary at the holding device 28 educated.

The end of detection 34 is by a biasing device 64 with a predefined biasing force in the forward movement direction, ie in particular with respect to the central axis directed radially inward, biased.

In the illustrated embodiments, the biasing means 64 a feather 66 on that between the first subelement 40 and the second subelement 42 acts. The feather 66 is in particular designed as a compression spring, which in the sleeve area 46 is introduced.

The second subelement 42 has one at the end of the collection 34 opposite end of a pen area 68 in the sleeve area 46 is introduced and the against the spring 66 suppressed. Next, the second sub-element 42 a stop area 70 to interact with a later in more detail stop 72 the holding device 28 on.

At the in 1 to 11 illustrated first embodiment, the pin area 68 at least one preferably across the pin area 68 reaching slot 74 in which at least one on the sleeve portion 46 fixed inside limiting pin 76 is guided. About the leadership of at least one limiting pin 76 in the slot 74 are the first subelement 40 and the second subelement 42 in the longitudinal direction of the finger element 26 limited to each other movable. In the illustrated embodiment, a first and a second limiting pin 76 provided so that even through the guide in the slot 74 over the spaced limiting pins 76 a tilt protection is given. Instead of two spaced boundary pins 76 could also be a longitudinal direction of the oblong hole 74 elongated limiting pin 76 be provided to fulfill this function. Next are the first and the second subelement 40 . 42 about the engagement of the limiting pins 74 in the slot 74 rotatable to each other.

How best 5 can be seen, is the pen area 68 Run thinner at one end and, as in 4 visible with the continuous slot 74 provided by which the two sides of the sleeve area 46 attached boundary pins 76 succeed. Next points the pen area 68 a thickening on the stop area 70 forms. In this thickening a longitudinal bore is provided in the one end of a pin member 77 is inserted, which is the end of detection 34 having. This pin element 77 is in the stop area 70 by a screw, z. B. grub screw 78 , secured. Other designs of the pen area 68 and the area with the detection end are conceivable. It is generally preferred that the second subelement 42 multi-part with a guide area (eg the pen area 68 ) and a detection area 36 is formed, wherein a releasable connection is formed therebetween. As a result, only the detection range can be 36 exchange and / or train in materials other than the guidance area. The coverage area 36 comes in the course of use as shown in more detail below with the leaders 12 in contact and thus forms a wearing part, which is easily replaceable due to the detachable connection.

The following is based on the representations in the 1 to 11 the structure of the positioning unit 24 the preferred embodiment explained in more detail in greater detail.

The positioning unit 24 has the finger element 26 , the holding device 28 and an output element 80 on.

The holding device 28 is designed to be the finger element 26 radially to the central axis and in the longitudinal direction of movement of the finger element 26 to keep moving. For this purpose, the holding device 28 a first guide unit 82 and a second guide unit 84 on, with the leadership units 82 . 84 in the longitudinal direction of the finger element 26 spaced apart from each other.

The first leadership unit 82 has a guide recess, a guide groove or - as provided in the illustrated embodiment - a guide bore 86 on. The second subelement 42 is through the guide hole 86 passed through, so that at the radially inner end of the guide bore 86 the end of detection 84 protrudes. The boundary of the relative to the central axis radially outer end of the guide bore 86 acts as a stop 72 ,

The second guide unit 84 has several guide rollers in the illustrated embodiments 88 on, on which the drive element 32 is guided longitudinally movable. In the illustrated embodiments, the drive element 32 at an inner area the rack 44 on and outside is provided with smooth surfaces on which the guide rollers 88 attack and act as a storage area.

The output element 80 has an externally toothed gear 90 on which with the rack 44 combs.

The following is based on the representation in the 1 to 11 the structure of a preferred embodiment of the positioning device 10 explained in more detail.

As already explained above, the positioning device has the holder 22 on, at which the positioning units 24 are distributed all around.

The holder 22 has at least one stationary part 92 and a relative to the stationary part 92 rotatable about the central axis drive part 94 on.

The stationary part 92 has an annular disc-shaped base plate in the illustrated embodiment 96 on, at the radially inner region of a thicker annular disc 98 is provided, which the guide holes 86 of all positioning units 24 having. The ring disk 98 thus shows all attacks 72 the individual positioning units 24 on.

An inner opening of the annular disc 98 is so big that the case 16 can be passed.

At the base plate 96 is each per positioning unit 24 a backdrop pin 58 intended. Next are at the base plate 96 corresponding bearings for the guide rollers 88 and the externally toothed gear 90 the individual positioning units 24 intended. Next, the stationary part 92 still have a cover disc, not shown in the figures, which serve as ring disc cover on the in 1 shown structure can be placed.

The drive part 94 is as a ring-shaped internally toothed gear 100 trained and can be a boom 102 have, on which an actuator, not shown (eg linear actuator) for rotating the drive part 94 can attack. The annular internal gear 100 is with each externally toothed gear 90 the individual positioning units 24 engaged.

The operation of the positioning device will be described below 10 based on 1 to 11 explained in more detail.

The 1 to 3 show an initial position, the finger elements 26 are located completely radially outward in the rearward position. The first and the second subelement 40 . 42 are pulled apart. The end of detection 34 is in the respective guide bore 86 withdrawn into it. Here is the coverage area 36 with the comb structure 38 down in 1 directed.

The scenery pin 58 is located at the beginning of the scenery 55 , The control curve 52 the scenery 55 is such that they are from the end of the detection 34 out towards the drive element 32 seen first in a radial direction relative to the central axis and in the longitudinal direction of the finger element 26 directed linear region, then one over a 90 ° region of the sleeve portion 46 over the circumference of the sleeve area 46 guided curved area 104 and then a short turn in the longitudinal direction of the finger element 26 directed linear end region 106 having. In 4 is only the curved area of the backdrop 104 and the short linear end region 106 to see.

In the in the 1 to 3 shown position is the positioning device 10 on the case 16 of the stator after the bends of the conductor ends in the radial and circumferential directions (widths and cabinets) described in the prior patent applications [1] to [3] have been performed.

Subsequently, by means of the actuator, the drive part 94 and thus the internal gear 100 turned around the central axis. As a result, the gear wheels are externally toothed 90 trained drive elements 32 moved, so the racks 44 the finger elements 26 of all positioning units 24 be driven and the first sub-element 40 in the forward movement direction, that is moved in the direction of radially inward. About the pretensioner 64 So will the second subelement 42 moved. Thus, each finger element performs 26 a first linear movement through until the stop area 70 against the respective attack 72 moves.

The basic principle of the illustrated embodiment of the positioning device 10 acts accordingly so that the large internal gear 100 is actuated by a drive unit such as an actuator. By this operation, the internally toothed gear 100 put in a rotation. The rotation will be here 54 identical outer toothed gears 90 also put in a rotation. Over a respective rack 44 If the rotational movement is converted back into a linear movement, but now here move the 54 as finger elements 26 trained slider at the same time inside. The sleeve of the sleeve area 46 has a helical groove in which a as a guide pin 58 acting bolt is running.

The situation after the first linear movement is in the 4 and 6 to 8th shown. Through this first linear movement, the detection ends 34 between the leaders 12 coming from neighboring grooves 18 stand out, retracted. The coverage area 36 , here with the comb structure 38 , is towards the case 16 directed. How out 4 can be seen, touches one of the limiting pins 76 still the back end of the slot 74 and is by the spring 66 held. The feather 66 causes a predetermined urging force on the detection area 36 , The scenery pin 58 is now at the beginning of the curved area 104 the scenery.

The internally toothed gear 100 is moved on in continuous motion; now beat the stop areas 70 against the respective attack 72 on, so that thereby no further movement of the second sub-element 42 in the radial direction to the front. At the same time the scenery pin 58 now through the curved area 104 led the backdrop, causing a rotation of the sleeve area 46 causes. About the limiting pins 76 and the slot 74 as well as a forced rotation of the second sub-element 42 while now the boundary pins 76 inside the long hole 74 move forward.

The movement can be done until the sleeve area 46 against the stop area 70 moves. Thus, over the curved area 104 a twist of the detection end 34 and thus the coverage 36 by a predetermined angle, for example 90 °. As a result, the projections of the comb structure 38 of the detection area between the conductor ends 12 guided, which together from a corresponding groove 18 protrude. The end position is then in the 5 and 9 to 12 shown.

Accordingly, by the helical groove of the scenery 55 from the linear movement of the rack 44 produces a combined movement of at first a linear and then a rotary movement. The sleeve of the sleeve area 46 thus ensures that acting as a positioning finger or rotary finger second sub-element 42 can then turn after a linear movement.

The first movement thus takes place in the 1 to 3 illustrated basic position out so that the internally toothed gear 100 is set in rotation. The trained as a rotary finger second sub-elements 42 the finger elements 26 set in motion at the same time. Initially, a linear movement is done by means of the rack 44 executed. Should one of the second sub-elements to a resistance, for. B. an incorrectly positioned conductor end 12 or it can push a foreign object by compressing the spring 66 Dodge so that it and the component are protected from damage.

In the in 8th shown magnification is that after performing this first linear movement, the rack 44 partly now drove inward. As a result, the linear movement of the second sub-element 42 now completely executed. The second subelements 42 now stand between the hairpin rows.

Subsequently, a further region of the linear movement of the first sub-elements 40 ,

The internally toothed gear 100 will continue to be twisted. This causes the rack to move 44 further inwards. Through the helical groove in the sleeve of the sleeve area 46 becomes this linear motion of the first subelement 40 converted into a rotating movement. The trained as a rotary finger second sub-element 42 will not be pushed further forward, but will be rotated by 90 °.

As in the enlargement of the 12 can be seen, are now formed as a rotary finger second sub-elements 42 90 ° twisted to the in 8th pictured previous situation between the hairpins. The rack 44 has fully advanced to the center and the sleeve of the sleeve area 46 is rotated 90 °. This position is the front end position of the positioning method.

The aim of the positioning method is, for example, trained as hairpins leader ends 12 in an intermediate step of the manufacturing process of the component of an electrical machine between a cabinet and the placement of a welding gauge no longer let go and thus avoid an additional source of error in the manufacturing process and, accordingly, to make a machine process more reliable.

Although the positioning device shown here 10 and the positioning method feasible with reference to a detailed embodiment of the 1 to 11 has been explained in detail, the teaching presented here is not limited thereto. Any deviations, combinations and sub-combinations are possible. The individual elements, units and devices of the positioning device can also be designed differently. Also the transfer gear 30 may be different.

A possible alternative for the design of the finger elements 26 is in 12 shown. In this case, the same reference numerals have been used for corresponding elements, and it can be made for the explanation of these elements in the above description with respect to the first embodiment. Notwithstanding the first embodiment, this is the transfer gear 30 not between the first subelement 40 and the holding device 28 formed, but between the first sub-element 40 and second subelement 42 , The first subelement 40 is thus not rotatable, but only by means of the rack 44 displaceable. The second subelement 42 is inside the sleeve of the sleeve area 46 slidably and rotatably received, wherein the first transmission element 50 to the sleeve area 46 and the second transmission element 62 at the pen area 68 is trained. The scenery 55 can here purely the curved area 104 exhibit.

In this embodiment, first the entire finger element 26 by means of the rack 44 moved forward to perform the first linear movement until the stop area 70 against the respective attack 72 moves. Thus, the second subelement becomes 72 prevented from further linear movement; Subsequently, a relative linear movement takes place between the first subelement 40 and the second sub-element, which relative linear movement over the transfer gear 30 in a rotational movement of the second partial element 42 is converted.

Otherwise, the elements are the same as the finger element 26 of the first embodiment described above.

LIST OF REFERENCE NUMBERS

10

positioning

12

conductor end

14

module

16

casing

18

groove

20

Conductor end arrangement

22

bracket

24

positioning

26

finger member

28

holder

30

conversion gear

32

driving element

34

detection end

36

detection range

38

comb structure

40

first subelement

42

second subelement

44

rack

46

sleeve region

48

Swivel joint of the first subelement

50

first transmission element

52

cam

54

Cam follower

55

scenery

56

link guide

58

link pin

60

Cam member

62

second transmission element

64

biasing means

66

feather

68

pin section

70

stop area

72

attack

74

Long hole

76

limiting pin

77

pin element

78

grub screw

79

drilling

80

output element

82

first leadership unit

84

second management unit

86

guide bore

88

leadership

90

externally toothed gear

92

stationary part

94

driving part

96

baseplate

98

washer

100

internal gear

102

boom

104

curved area of the backdrop

106

linear end of the scenery

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102018103926 [0005]
• DE 102018103929 [0005]
• DE 102018103930 [0005]
• DE 102018103100 [0005]

Claims (15)

An elongate finger element (26) for positioning a conductor end (12) or a group of conductor ends (12) of a conductor end assembly (20) of conductor ends (12) projecting from a device (14) for forming a component of an electrical machine a drive member (32) for driving longitudinal movement of the finger member (26) in a forward direction and a backward direction, a forwardly-arranged detection end (34) retractable by forward movement of the finger member (26) between conductor ends (12) and having at a peripheral portion a detection area (36) projecting radially of a longitudinal axis of the finger member (26); and a gear member of a transfer gear (30) for converting a middle portion or end portion of a longitudinal movement of the finger member (26) in the forward direction in a rotational movement of the detection end (34). Finger element (26) after Claim 1 characterized in that the detection area (36) comprises one or more radial projections arranged in series to form a comb structure (38). Finger element (26) according to one of the preceding claims, characterized in that the transmission element (50, 62) is a control cam element with a control cam (52) or a cam follower element (54) for engaging a control cam (52) and / or that the transmission element (50, 62) is an element of a slotted guide (56). Finger element (26) according to one of the preceding claims, characterized in that the finger element (26) has a first part element (40) with the drive element (32) and a second part element (42) with the detection end (36), wherein the part elements ( 40, 42) are movable relative to each other in the longitudinal direction of the finger element (26), and wherein 4.1 is formed on one of the sub-elements (40, 42) the gear element (50) for co-operation with a stationary further gear element (62) of the transfer gear (30) or 4.2 is formed on the sub-elements (40, 42) the transfer gear (30) for converting a relative movement between the sub-elements (40, 42) in a rotational movement of the detection end (36). Finger element (26) after Claim 4 characterized by one or more of the following features 5.1: that the sub-elements (40, 42) are telescopically movable relative to each other; 5.2 that one of the sub-elements (40, 42) a sleeve portion (46) and the other sub-element (40, 42) has a pin portion which is slidably received in the sleeve portion (46), 5.3 that one of the sub-elements (40, 42) a Control cam (52) or control link has; 5.4 that one of the sub-elements (40, 42) has a cam follower element (54) acting on a control cam (52) or a guide pin (58) guided in a control cam; 5.5 that the sub-elements (40, 42) are rotatable relative to each other about the longitudinal axis; 5.6 that the sub-elements (40, 42) are rotationally fixed relative to each other 5.7 that the first sub-element (40) has a bearing area for longitudinally movable guiding in a holding device (28), 5.8 that the first sub-element (40) as a drive element (32) a threaded rod or a rack (44) or a rack area; 5.9 that the first sub-element (40) and the second sub-element (42) is biased by a biasing means or a mechanical force storage in one of the relative directions of movement; 5.10 that the first sub-element (40) and the second sub-element (42) is biased away from each other by a biasing means or a mechanical force accumulator; 5.11 that the first sub-element (40) or a portion of the first sub-element (40) is relatively rotatably articulated to the drive element (32). A positioning unit (24) for positioning a conductor end (12) or a group of conductor ends (12) of a conductor end assembly (12) of conductor ends (12) projecting from a component (14) for forming a component of an electric machine a finger element (26) according to any one of the preceding claims, a holding device (28), in which the finger element (26) is held longitudinally movable, and an output member cooperating with the drive member (32) and configured to transmit a drive force to the drive member (32) for driving the longitudinal movement. Positioning unit (24) after Claim 6 , characterized by one, several or all of the following features 7.1 that a finger element (26) according to one of Claims 4 or 5 and a stop (72), against which one of the sub-elements (40, 42) is movable in the course of the longitudinal movement, are provided and / or 7.2 that a driven element embodied as a toothed wheel is designed to cooperate with the drive element (32) designed as a toothed rack (44) or toothed rack area, and / or 7.3 that on the holding device (28) with the gear element (50, 62) on the finger element ( 26) cooperating stationary transmission element of the transfer gear (30) is provided; and / or 7.4 that the transfer gear (30) between the holding device (28) and the finger element (26) is formed; and / or 7.5 that the finger element (26) has a control cam element (60) with a control cam (52) and the holding device (28) has a cam follower element (54) which acts on the control cam (52). Positioning device (10) for positioning a conductor end (12) or a group of conductor ends (12) of an annular conductor end assembly (20) of conductor end (12) projecting from a component (14) for forming a component of an electric machine, comprising: one around one Central axis annular or ring-segment-shaped holder (22) on which a number of positioning units (24) according to one of Claims 6 or 7 are formed such that the finger elements (26) are designed to be directed radially to the central axis with the detection end (36) on the central axis to. Positioning device (10) after Claim 8 , characterized in that the holder (22) has a stationary part (92) and a relative to the central axis rotatable drive member (94) and a transmission for converting a rotational movement of the drive member (94) in a drive movement of the finger elements (26). Positioning device (10) after Claim 9 , characterized in that the transmission has an internal toothing on the drive part (94), which meshes with as the output elements (32) of the positioning units (24) acting gears. Positioning device (10) according to one of Claims 9 or 10 , characterized in that parts of the holder (22) are disc-shaped and the positioning units (24) are arranged therebetween. Positioning device (10) according to one of Claims 8 to 11 , characterized in that the holder (22) relative to the central axis radially extending guide recesses, guide grooves (86) or guide holes (88) for guiding the finger elements (26) or of first sub-elements (40) and / or second sub-elements (42) the finger elements (26). Use of a finger element (26), a positioning unit (24) or a positioning device (10) according to one of the preceding claims for threading conductor ends (12) into receiving openings of a positioning and clamping device for positioning and clamping the conductor ends (12) for further processing and / or or cutting and / or welding and / or joining. A method of positioning a conductor end (12) or a group of conductor ends (12) of a conductor end assembly (20) of conductor ends (12) projecting from a device (14) for forming a component of an electric machine, comprising: Longitudinally moving a finger element (26) for retracting a detection end (34) of the finger element (26) having at least one detection area (36) projecting radially to the detection end (34) at a peripheral area with a detection area aligned with the extension of the conductor ends (12) (36) between two conductor ends (12), and Translating a central portion or an end portion of the longitudinal movement of the finger member (26) into a rotational movement to rotate the detection end (34) retracted between the conductor ends (12) so as to interfere with the detection region (36) aligned transversely to the extension of the conductor ends (12) ) to detect and position at least one of the conductor ends (12). Method according to Claim 14 , comprising using the finger element (26) according to one of Claims 1 to 5 and / or the positioning unit according to one of Claims 6 to 7 or the positioning device (10) according to one of Claims 8 to 12 ,

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