Winding machine and method for producing coil winding on outer slot-type winding carrier of rotor or stator of electric machine, and winding installation

Abstract

The invention relates to a winding machine (1) for producing a coil winding on an outer slot-type winding carrier (3) of a rotor or stator of an electric machine, comprising a receiving device (2) for receiving the outer slot-type winding carrier (3) and a plurality of winding devices (4) arranged around the receiving device (2). The receiving device (2) has a longitudinal axis which lies on the longitudinal axis of the outer slot-type winding carrier (3) in a state in which the outer slot-type winding carrier (3) is received on the receiving device (2). Wherein each winding device (4) has a wire feed device (6) which is designed to move the wound wire in a feed direction and to guide it to the receiving device (2). Wherein each winding device (4) also has a drive system, which is designed to move the wire feed device (4) relative to the receiving device (2) and independently of the wire feed device of the other winding device (4) during a winding wire feed movement according to a winding movement, i.e., the winding device (2) is configured to be movable relative to the receiving device (2) and independently of the wire feed device of the other winding device (4). The winding wire is wound around the winding teeth (5) of the winding carrier (3) of the outer groove type received on the receiving device (2) to form a coil winding. The receiving device (2) has a rotary drive (10), by means of which the receiving device (2) can be rotated about a longitudinal axis of the receiving device and which is designed to rotate the receiving device (2) in accordance with a winding movement, the respective winding wire is wound around the associated winding teeth (5) of the winding carrier (3) of the outer slot type received on the receiving device (2) in order to form the respective coil winding. The invention further relates to a winding installation (17) having a plurality of winding machines (1) and to a method for producing a coil winding.

Description

Technical Field

[0001] The present invention relates to a winding machine, a method and a winding facility for establishing a coil winding on a winding support of an outer groove type of a rotor or a stator of an electric machine. Background Art

[0002] The rotor of an electric motor, in particular an externally grooved rotor of a synchronous motor which is implemented as a separately excited type, usually has teeth, and each of these teeth is wound with a copper wire, such as an enameled copper wire, in the form of a concentrated winding. In the field of traction drive devices, usually four to eight teeth are provided for such a rotor. The windings of the individual teeth are usually implemented as being connected in series and thus have a total of two terminal wires, and the terminal wires are generally electrically connected to a slip ring body. Here, the internal interconnection of each tooth coil is completed during the winding process itself. It is known from the prior art that these rotors are wound one tooth by one tooth in a horizontal or vertical manner using a wire guide and a single feed of the enameled copper wire.

[0003] During winding, a so-called needle-type winding machine is generally used, in which the wire is wound around the teeth by means of a needle-shaped conveying part to form a coil winding. Such a system has been described in document EP 1 191 672 B1. Documents WO 2015 / 189676 A1 and EP 1 376 829 B1 disclose a device in which a plurality of teeth of an inner groove type winding support can be wound by means of needles driven jointly. Summary of the Invention

[0004] The object of the present invention is to provide an improved technique for establishing a coil winding on a winding support of an outer groove type, by means of which an effective and efficient winding can be achieved in particular.

[0005] To solve this task, a winding machine for establishing a coil winding on a winding support of an outer groove type of a rotor or a stator of an electric machine is provided according to independent claim 1. In addition, a method for establishing a coil winding on a winding support of an outer groove type of a rotor or a stator of an electric machine and a winding facility are provided according to other independent claims. The design solutions are the subject matter of the dependent claims of the appended claims.

[0006] According to one aspect, a winding machine is provided for establishing a coil winding on a winding support of an outer groove type of a rotor or a stator of an electric machine. The winding machine is formed by a receiving device for receiving the winding support of the outer groove type and a plurality of winding devices arranged around the receiving device. The receiving device has a longitudinal axis which, in a state where the winding support of the outer groove type is received on the receiving device, lies on the longitudinal axis of the winding support of the outer groove type. Each of the winding devices has a wire feeding device which is configured to move the winding wire in a feed direction and thus guide it towards the receiving device. Each of the winding devices has a drive system which is configured to move the wire feeding device relative to the receiving device and independently of the wire feeding devices of the other winding devices during the feed movement of the winding wire in accordance with the winding movement in such a way that the winding wire is wound around the winding teeth of the winding support of the outer groove type received on the receiving device for forming a coil winding. The receiving device has a rotational drive device by means of which the receiving device can be rotated about the longitudinal axis of the receiving device. The rotational drive device is configured to rotate the receiving device in accordance with the winding movement so that the respective winding wire is wound around the relevant winding teeth of the winding support of the outer groove type received on the receiving device for forming the respective coil winding.

[0007] According to another aspect, a method is provided for establishing a coil winding on a winding support of an outer groove type of a rotor or a stator of an electric machine, the method having the following steps: receiving the winding support of the outer groove type on the receiving device of the winding machine such that the longitudinal axis of the receiving device lies on the longitudinal axis of the winding support of the outer groove type; and forming a plurality of coil windings simultaneously around the respective winding teeth of the winding support of the outer groove type by means of a plurality of winding devices arranged around the receiving device of the winding machine, wherein, in order to form the respective coil winding by means of the respective winding device, the winding wire is moved in the feed direction by means of the wire feeding device of the relevant winding device and thus fed to the relevant winding teeth, and during the feed movement of the winding wire, the wire feeding device of the relevant winding device is moved in accordance with the winding movement relative to the relevant winding teeth and independently of the wire feeding devices of the other winding devices and thus wound around the relevant winding teeth, and the winding support of the outer groove type is rotated by means of the rotational drive device of the receiving device so that the respective winding wire is wound around the relevant winding teeth of the winding support of the outer groove type to form the respective coil winding.

[0008] According to another aspect, a winding facility is formed by means of a plurality of winding machines according to the present disclosure, wherein the winding machines are configured to establish coil windings in parallel on the respective winding supports of the outer groove type of the rotor or the stator in the winding facility.

[0009] Using the technology according to the present disclosure, multiple wire rods can be simultaneously conveyed to the winding support, wherein each wire rod conveying device faces different winding tooth portions and can operate independently. By means of a parallel working mode, the process time for winding the winding support can be reduced. In particular, according to the present disclosure, the winding equipment runs at least sometimes in parallel in time so as to synchronously establish multiple coil windings. Preferably, the winding equipment is configured to run substantially completely in parallel in time, and this running mode is correspondingly set for the method. By such synchronous winding of multiple tooth portions of the winding support, it is possible to avoid or reduce cracking of the laminations of the winding support on the side opposite to the individually wound tooth portions, especially in the case of a laminated winding support. According to the present disclosure, it is possible to establish a coil winding on a laminated outer groove-type winding support, that is, to establish a coil winding on a winding support composed of a component formed by multiple laminations defining the outer contour of the winding support, especially a stacked winding support.

[0010] The devices for a drive system for movement according to the winding movement and a rotary drive device can in particular include corresponding control by means of one or more control devices provided therefor. Here, a common control device can be provided, a corresponding control device can be provided for each element generating the movement, or multiple control devices can be provided for one or a group of elements generating the movement.

[0011] In a preferred embodiment, it can be provided that, by means of the rotary drive device, the receiving device is rotated at least partly in synchronization with the corresponding winding movement of the winding equipment according to the winding movement. Thus, by at least partly superimposing various different provided movements, a winding movement precisely matched to the winding support to be wound can be implemented. For example, by superimposing the rotation of the receiving device and the movement of the wire rod conveying device in the axial direction (i.e., parallel to the longitudinal axis), the winding wire rod can precisely lay the wire rod around the rounded corner of the winding tooth portion and / or guide it in the inclined groove extending between two winding tooth portions of an inclined groove-type winding support.

[0012] The wire rod can be conveyed from a corresponding wire rod storage, especially a corresponding reel, to the winding machine and here to the winding equipment. The wire rod storage can form part of the winding machine or be arranged outside the winding machine.

[0013] The winding equipment is preferably arranged around the longitudinal axis of the receiving device and thus along the periphery of the winding support accommodated in the receiving device.

[0014] The winding equipment can be configured according to the well-known needle winding technology. In particular, the winding equipment can each have a tubular wire rod conveying device, which can be called a needle or a wire guide nozzle, and is configured to be introduced into the intermediate space between two tooth portions and then convey the coil wire rod to move around the tooth portion in order to establish a coil winding.

[0015] In a winding machine, the rotation of the receiving device is used to rotate a winding support of an outer groove type accommodated on the receiving device, so that the winding support of the outer groove type rotates according to the winding movement at least partially synchronously with the corresponding winding movement of the winding device by means of a rotation drive device according to the method of the present disclosure, so that the corresponding winding wire is wound around the relevant winding teeth of the winding support of the outer groove type to form a corresponding coil winding. As the winding support of the outer groove type is accommodated on the receiving device of the winding machine, a winding assembly including the winding machine and the winding support can be formed.

[0016] The winding machine can have at least three winding devices. For example, the winding machine can have exactly three winding devices. Alternatively, two or more than three winding devices can be provided. In particular, the number of winding devices of the winding machine can be selected as follows, that is, to make efficient use of the available structural space around the receiving device. For example, by arranging the maximum possible number of winding devices around the receiving device in the case of hindering the corresponding movement of the winding device to make efficient use.

[0017] The winding devices can be arranged evenly around the receiving device with respect to the perimeter of the winding support to be arranged in the receiving device. Thus, in an embodiment with three winding devices, the corresponding angle between two adjacent winding devices (around the longitudinal axis or along the circumferential direction of the winding support to be arranged in the receiving device) can be 120 degrees. In the case of more or fewer winding devices, the corresponding angles are obtained while being evenly distributed.

[0018] The receiving device can have a workpiece support which is configured to receive an outer grooved winding support and is detachably arranged in a winding machine so that it is possible to transport the outer grooved winding support received on the workpiece support to and from the winding machine. It can be provided here that the winding support moves away from the workpiece support when received on the receiving device, so that the winding support is arranged on the receiving device during the winding process rather than on the workpiece support. Here, the workpiece support itself can be arranged on the receiving device. The workpiece support can be detachable from the receiving device in order to arrange the winding support on the workpiece support away from the receiving device. In this embodiment, the workpiece support can alternatively not be part of the receiving device but be provided independently of the receiving device. In one embodiment, the workpiece support has a recess through which a corresponding holding projection of the receiving device is guided in order to come into contact with the winding support and receive it on the receiving device. Here, the winding support can move away from the workpiece support, so that the workpiece support separates from the winding support and remains at the receiving device outside the area where the coil winding is established. Alternatively, it can be provided that the winding support remains on the workpiece support and is received at the receiving device in such a way that the workpiece support is fastened to the receiving device. In this case, it can be provided that the rotation of the receiving device about its longitudinal axis is transmitted to the workpiece support, so that the workpiece support rotates about the longitudinal axis of the workpiece support, and the rotation of the workpiece support is in turn transmitted to the winding support in order to effect the rotation of the winding support, in particular as part of the winding movement.

[0019] For each of the winding devices, the associated drive system can be configured to move the wire delivery device relative to the receiving device according to the winding movement in such a way that it moves in a first direction extending parallel to the longitudinal axis of the receiving device and in a second direction extending perpendicular to the longitudinal axis of the receiving device and passing through the longitudinal axis of the receiving device. Thus, with respect to the winding support received on the receiving device, the axial movement is provided by the movement in the first direction and the radial movement is provided by the movement in the second direction.

[0020] The movement of the winding device in the corresponding second direction can in particular be used to feed the associated wire conveying device into the winding support accommodated on the accommodating device, for example until it enters the intermediate space between the teeth of the winding support. The movement of the winding device in the corresponding first direction can in particular be used to move the associated wire conveying device along and / or through the intermediate space between the teeth of the winding support accommodated on the accommodating device. By means of the rotation of the accommodating device, due to the resulting rotation of the winding support accommodated on the accommodating device, a relative movement of the winding device, in particular the wire conveying device of the winding device, relative to the winding support in the tangential direction of the winding support can be provided. By combining the rotation of the accommodating device with the movement of the winding device (in particular the wire conveying device of the winding device), a relative movement of the winding device relative to the winding support accommodated on the accommodating device in the circumferential direction of the winding support can be provided.

[0021] For each of the winding devices, a winding movement with respect to the to-be-wound teeth of the winding support accommodated on the accommodating device can be achieved, in which the wire conveying device of the winding device (preferably designed as a wire conveying device according to the itself-known needle winding technique) is introduced into the intermediate space between the to-be-wound tooth of the winding support and the adjacent tooth, guided through the intermediate space in a direction parallel to the axis of the winding support until the wire conveying device leaves the intermediate space in a direction parallel to the axis of the winding support, and then (at least partially in the tangential direction and / or circumferential direction of the winding support) guided around one end of the to-be-wound tooth. Subsequently, it is introduced into another intermediate space between the to-be-wound tooth and another adjacent tooth opposite to the adjacent tooth in a direction parallel to the axis of the winding support, guided through this other intermediate space in a direction parallel to the axis of the winding support until it leaves this other intermediate space, at least partially guided around the opposite end of the to-be-wound tooth in the tangential direction and / or circumferential direction of the winding support, and then again introduced into the intermediate space between the to-be-wound tooth of the winding support and the adjacent tooth. Here, the wire conveying device conveys the wire such that the wire is wound around the to-be-wound tooth, wherein with each repetition of the winding movement, a single coil winding is laid around the to-be-wound tooth.

[0022] Each, individual or one of the winding devices can move in a third direction, which third direction of movement extends perpendicular to the first direction and perpendicular to the second direction. Thus, with respect to the winding support accommodated on the accommodating device, a tangential movement is provided by the movement in the third direction. In a preferred design, the movement in the third direction is not part of the winding movement. In this or other designs, the movement in the third direction can be used to feed the associated wire conveying device to or into the winding support accommodated on the accommodating device, if necessary in combination with the movement in other directions. Alternatively or additionally, the movement in the third direction can, if necessary in combination with the movement in other directions, be used to perform winding fixation (Anwickeln) at the contact position of the winding support. In such winding fixation, it can be provided that the free end of the winding wire is guided to a predetermined contact position of the winding support, in particular to a receptacle provided therefor, and fixed there. The contact position can be established for making electrical contact with the winding wire via this contact position, in particular making electrical contact from outside the winding support and / or for establishing an electrical connection between the winding wires arranged on the winding support, in particular between the winding wires of different windings. After such a winding fixation movement and fixing the winding wire at the contact position, the wire conveying device can be brought to the position where it was at the start of the winding movement. In a design, the movement in the third direction can be part of the winding movement, in particular an alternative or supplement to the rotation of the accommodating device.

[0023] As an alternative or supplement to the third direction, each, individual or one of the winding devices can move in a fourth direction, which fourth direction extends on an arc around the longitudinal axis and thus extends in the circumferential direction with respect to the winding support accommodated on the accommodating device. The movement in the fourth direction can be provided as part of the winding movement and / or independently of the winding movement, in particular as a feeding movement and / or a winding fixation movement (Anwickelbewegung).

[0024] The movement in the fourth direction can be provided as an alternative to the movement in the second direction. In this case, the feeding of the associated wire conveying device into the intermediate space between the teeth of the winding support accommodated on the accommodating device can be carried out in a manner parallel to the axis of the winding support.

[0025] For each of these winding devices, the drive system can be set up such that the wire feed device oscillates about an oscillation axis which extends perpendicular to the longitudinal axis of the receiving device and extends at a distance from this longitudinal axis. Thus, the oscillation axis extends tangentially with respect to the winding carrier accommodated on the receiving device. Thus, in particular, it can be provided that the oscillation of the wire feed device designed according to needle winding technology about the oscillation axis is taken as part of the winding movement and / or as part of the feed movement and / or the winding fixing movement.

[0026] Each, individual or one of these winding devices can have a stripping device which is set up to remove the insulation of the wound wire. The insulation stripping device is preferably set up to selectively remove the insulation of the wound wire in sections, in particular at the ends of the wound wire, in order to enable or simplify electrical contact. The insulation stripping device can be set up to remove the insulation of the wound wire during the feed movement of the wound wire and / or during the rest of the wound wire. The insulation stripping device can remove the insulation by grinding, by means of one or more milling devices, thermally (in particular by means of a heating device) and / or in some other way. The removal of the insulation by grinding can be effected, for example, by means of a rotating tool of the insulation stripping device, such as three or four tools arranged around the wire to be fed. For example, a tool rotating at a speed of 9,000 to 15,000 revolutions per minute, preferably having a diamond cutting edge, can be provided for the insulation stripping device.

[0027] Each, individual or one of these winding devices can have a wire clamping device which is set up to clamp the wound wire and prevent the wound wire from moving in the feed direction. Preferably, it can be provided that the wound wire is to be clamped during periods without winding movement, in particular during periods when no winding carrier is accommodated on the receiving device, in order to prevent the wound wire from moving along or against the feed direction relative to the associated wire feed device.

[0028] In each, individual or single winding device, there can be provided at least one preforming element that can move relative to the wire conveying device of the winding device, and the preforming element can move between a rest position and an intervention position, wherein the preforming element can exert a lateral force on the wound wire in its intervention position and thereby exert an elastic to plastic prestress, which will continuously affect the characteristics of the wound wire in the following manner when colliding with the winding support accommodated on the receiving device and when forming a coil winding forward, that is, completely or sufficiently partially compensate the tendency of the laid wound wire to form bulges between the bending points. Thus, the relevant winding device can be set up to lay a bundled article, that is, a wound wire, conformingly on a non-circular support body, that is, on the teeth of the winding support accommodated in the receiving device, wherein, in particular, the bulge of the wound coil is minimized. In this regard, the design solutions described for such a winding device in document EP 2 309626 A1 can be correspondingly set up.

[0029] The receiving device can be set up to accommodate an externally grooved winding support of a traction drive device (especially a separately excited traction drive device), and the winding device can be respectively set up to form a coil winding around the winding teeth of the externally grooved winding support of a traction drive device (especially a separately excited traction drive device). Thus, it is provided that the winding support of the traction drive device is arranged on the receiving device and the coil winding is wound on the winding support. Correspondingly, in the method according to the present disclosure, it can be provided that a coil winding is established on the externally grooved winding support of the rotor or stator of the traction drive device. According to the present disclosure, a traction drive device is understood as a driver that promotes the forward movement of a vehicle driven by power. The traction drive device can, for example, drive the rotation of the wheels of a vehicle (passenger vehicle, heavy vehicle, motorcycle), the rotation of the drive device (propeller) of a ship or a small boat, or the rotation of the drive device (such as a propeller blade) of an aircraft. In a preferred design, the present disclosure relates to a traction drive device implemented as a separately excited synchronous motor. For the rotor of such a traction drive device, it is industry practice to wind a coil winding around all the teeth of the winding support of the rotor successively with a single wire, so that the coil windings are connected in series. In contrast, according to the present invention, a plurality of coil windings are wound in parallel in time, so that after the winding process is completed, these coil windings are interconnected according to the requirements of a given application.

[0030] In the case where a coil winding is formed in combination with the winding teeth of a winding bracket of an outer groove type around a traction drive device, in particular, the following design can be provided, in which the winding device is respectively provided with an insulating portion stripping device. By selectively removing the insulating portion at the end of the wire by means of the insulating portion stripping device, the contact with the end of the wire used for electrically interconnecting a plurality of coil windings can be facilitated or improved. In particular, it can be provided that, in order to interconnect the coil windings, resistance welding is performed on the ends of the wire, and resistance welding can be achieved or facilitated by selectively removing the insulating portion by means of the insulating portion stripping device. By means of such improved contact with the ends of the wire, in particular, possible error sources occurring in the contact can be eliminated or reduced, thereby completely or partially compensating for or avoiding the disadvantages with respect to winding the coil windings around all the teeth of the winding bracket of the rotor by means of a single wire in sequence.

[0031] For the outer groove type winding bracket of a separately excited synchronous motor of a traction drive device, usually all windings are wound in sequence by means of a single wire. From the perspective of a person skilled in the art, establishing multiple windings in parallel in terms of time faces the following problems: the cost is increased due to the necessity of components for winding interconnection; there is a risk that the electrical characteristics of the windings are different due to manufacturing tolerances between different batches of nominally identical winding wires; and the complexity problem is increased by operating multiple winding machines in parallel. It has surprisingly been found that these disadvantages can be compensated for by the advantages of the winding technology according to the present disclosure. Thus, by means of the winding technology according to the present disclosure, it is possible to individually implement different windings on the winding bracket, for example, different wire diameters, different wires (materials / structures), and / or different numbers of turns. By selectively contacting and interconnecting different windings, various circuits can be realized during operation, such as the so-called star circuit and delta circuit. In addition, the windings can be implemented as being connected in parallel, and it can be provided that a switch to series connection is made during operation. Thus, according to the present disclosure, it is possible to manufacture a drive device that is individually matched to a specific application situation. In particular, it is possible to advantageously influence the driving characteristics of a vehicle driven by a drive device manufactured in this way, for example, for urban driving or highway driving, and / or to improve the efficiency of the drive device.

[0032] The embodiments described above in connection with the winding device can be correspondingly provided as a method for establishing a coil winding on an outer groove type winding bracket of a rotor or stator of an electric motor.

[0033] In the winding facility according to the present disclosure, it can be provided that the winding machines are arranged side by side or stacked on top of each other such that the longitudinal axes of their respective receiving devices are arranged parallel. Alternatively, an arrangement can be provided in which the longitudinal axes of the respective receiving devices coincide with each other, i.e., the winding machines are arranged axially. As another alternative, a matrix arrangement can be provided, in which the winding machines are arranged in rows and columns. Preferably, the winding machines of the winding facility are set up for simultaneous operation, such that coil windings are simultaneously established on a plurality of winding supports, where preferably a plurality of coil windings are simultaneously established on each winding support. The winding machines of the winding facility can be designed in the same way or designed according to different embodiments of the winding machines according to the present disclosure as described above. Description of the Drawings

[0034] Other embodiments are further described below with reference to the views in the accompanying drawings. In the figures:

[0035] Figure 1 Schematic view of a winding machine shown in axonometric;

[0036] Figure 2 Isometric view details of a winding machine shown schematically;

[0037] Figure 3a Schematic substructure components of the winding device of a winding machine shown;

[0038] Figure 3b Shows according to Figure 3b Schematic detailed view of the substructure components of, in which a swinging needle is shown;

[0039] Figure 4 Schematic view of a winding machine shown in a top view;

[0040] Figure 5 Schematic detail view of a winding machine shown in a top view;

[0041] Figure 6 Schematic detail view of a winding machine shown in a top view, in which a wire conveying device arranged in the tooth intermediate space of a winding support is shown;

[0042] Figure 7 Schematic detail view of a winding machine shown in a side view;

[0043] Figure 8 Schematic cross-sectional view of a winding machine shown;

[0044] Figure 9 Schematic detail view of a winding machine shown in a cross-sectional view;

[0045] Figure 10 Schematic view of a winding machine with a robotic handling device shown in axonometric;

[0046] Figure 11 Schematic detail view of a winding machine with a robotic handling device shown in axonometric view;

[0047] Figure 12 Schematic view of a winding machine with a wire storage; and

[0048] Figure 13 Schematic view of a winding facility with two winding machines. DETAILED DESCRIPTION

[0049] Figure 1 Shown is a winding machine 1 for establishing a coil winding on a winding carrier of an outer slot type of a rotor or stator of an electric machine, the winding machine having a receiving device 2 on which a winding carrier 3 of an outer slot type is arranged. In the shown embodiment, the winding carrier 3 is a winding carrier of a rotor of an electric motor which forms a traction drive device for an electric vehicle. Arranged around the receiving device are three winding devices 4 which are each used for forming a coil winding on the winding carrier 3.

[0050] In Figure 2 a detail view of the winding machine 1 is shown. It can be seen that the winding carrier 3 is formed with a plurality of tooth portions 5 around which the coil windings will be respectively wound for manufacturing the rotor. The winding devices 4 are arranged at uniform intervals along the circumferential direction of the winding carrier 3. Herein, the winding devices 4 are configured to wind the coil according to a known needle winding technique. For this purpose, each of the winding devices 4 has a tubular wire delivery device 6 as a so-called needle.

[0051] Figure 3a The structural components of the winding device 4 according to the present disclosure are shown in detail. Above and below the wire delivery device 6 (which has an elliptical tube cross-section in the shown embodiment) are arranged preforming elements 7 which can move forward from a rest position into an intervention position. In the intervention position, the preforming elements 7 apply an elastic to plastic prestress to the winding wire guided from the wire delivery device 6 past the preforming elements 7. By this prestress, the characteristics of the winding wire are affected in a preforming sense when hitting the tooth portions 5 of the winding carrier 3 and when forming the coil winding advancing, such that the tendency of the laid winding wire to form bulges between the bending points is fully or sufficiently partially compensated. By preventing or reducing the bulges, the space between the tooth portions 5 of the winding carrier 3 can be better utilized, thereby increasing the winding density. The function of such preforming elements 7 is described in detail in document EP 2 309 626 A1.

[0052] Figure 3b is shown in a state where Figure 3astructural components, in which state the wire conveying device 6 pivots relative to Figure 3a the state shown in. In order to pivot the section having the wire conveying device 6, the structural components have a swinging mechanism 8. Here, the swinging takes place in the vertical direction of the winding device, so that the swinging axis of the wire conveying device 6 extends perpendicular to the longitudinal axis of the receiving device 2 and extends at a distance from the longitudinal axis in the winding machine 1, and this longitudinal axis lies on the longitudinal axis or the axis of rotation of the winding support 3 received on the receiving device 2.

[0053] Figure 4 A top view of the winding machine 1 is shown, from which it can be clearly seen how the winding devices 4 are arranged uniformly around the receiving device 2 and the winding supports arranged on the receiving device.

[0054] For example, as can be seen in Figure 1 , each winding device 4 has a drive system, which in the shown embodiment is formed by a plurality of drive means 9 in the form of electric motors and corresponding motion transmission mechanisms. With the aid of the drive system, each winding device 4 can be moved in the axial direction, the radial direction and the tangential direction parallel to the winding support 3 with respect to the winding support 3 arranged on the receiving device 2. The receiving device 2 has a rotary drive 10, and the receiving device 2 together with the winding support 3 received thereon can be rotated about the longitudinal axis of the receiving device 2 and thus about the axis of rotation of the winding support 3 by means of this rotary drive. With the aid of this movement, winding of the winding support 3 can be achieved in accordance with the respective winding movements of the winding devices 4.

[0055] The winding will be described below for one of the winding devices 4. These explanations apply correspondingly to the winding movements of the other winding devices 4, in particular to the simultaneous winding movements of all winding devices 4. For this purpose, first the wire conveying device 6 is fed into the winding support 3. This is particularly visible in Figure 5 and 6 , where Figure 5 shows the winding machine 1 before the wire conveying device 6 is fed in, while Figure 5 shows the winding machine 1 after the wire conveying device 6 has been fed in. The feeding takes place in such a way that the wire conveying device 6 is arranged in the intermediate space 11 between the two tooth portions 5 of the winding support 3. Here, the feeding can take place directly between the tooth portions 5 and into the winding support 3 or in such a way that the wire conveying device 6 is arranged between the tooth portions 5 in a top view, but above or below the winding support 3. During feeding, fine adjustment in the intermediate space 11 can be achieved in particular by means of the movement of the winding device in the tangential direction parallel to the winding support 3.

[0056] After feeding in, the wire feeding device 6 guides around one of the tooth parts 5 of the winding support 3. Herein, the wound wire is sent out from the wire feeding device by means of a feeding movement, so that the wire is laid around the relevant tooth part 5, thereby forming a coil winding. Here, the wire feeding device 6 is guided axially through the intermediate space 11. During the wire feeding device 6 moving upward or downward out of the intermediate space 11, the rotation of the winding support 3 is started by means of the rotary drive device 10 of the receiving device 2 until the wire feeding device 6 is arranged above or below another intermediate space 11 adjacent to the relevant tooth part 5. By superimposing the axial movement of the wire feeding device 6 and the rotation of the winding support 3, the wire feeding device 6 follows a circular segment-shaped movement trajectory and the (rounded) corners of the relevant tooth part 5. In an alternative embodiment, by superimposing the axial movement of the wire feeding device 6 and the rotation of the winding support 3, a movement trajectory with other shapes different from the circular segment shape (such as elliptical or according to a functional equation) can also be provided. Subsequently, the wire feeding device 6 is axially guided through this other intermediate space 11, and is fed into the aforementioned intermediate space again by means of the rotation of the receiving device 2 and the winding support 3. By repeating this winding movement, a coil winding is laid around the tooth part 5. In Figure 6 a coil winding that has been wound around the tooth part 5 of the winding support 3 can be seen.

[0057] In Figure 1 and Figure 2 's design, it can be seen that an inclined groove-shaped winding support 3 is accommodated on the receiving device 2. For this reason, the winding support 3 is additionally rotated by means of the rotary drive device 10 during the axial movement of the wire feeding device 6 through the relevant groove 11, so that the wire feeding device 6 follows the inclined groove path. In the case of a straight groove-type winding support, this rotation can be omitted. In the design, the rotation for feeding into another intermediate space 11 can be carried out only after the wire feeding device 6 completely leaves the intermediate space 11 and without time overlap, so that the movement trajectory of the wire feeding device 6 has corners. This design can be set, for example, in the case where the tooth part edge is not rounded, or when it is not necessary to move along a rounded path for other reasons.

[0058] In an embodiment where the winding device 4 has a corresponding swinging mechanism 8 for swinging the wire feeding device 6, the winding movement can be modified and thus optimized by means of the swinging movement.

[0059] Since each winding device 4 has its own drive system, in addition to the rotation of the receiving device 2, they can independently implement the winding movement independently of other winding devices 4.

[0060] The receiving device 2 has a workpiece support 12 on which the winding support 3 is first received. For this purpose, the workpiece support 12 can be separable from the receiving device 2, or the winding support is directly arranged on the workpiece support 12 of the receiving device 2. Before starting winding, the receiving shaft 13 of the receiving device 2 is guided through the central hole of the winding support 3, and the winding support 3 is lifted from the workpiece support 12 by means of the boss of the receiving shaft 13. During winding, the receiving shaft 13 is driven and rotated by means of a rotary drive device 10, whereby the receiving shaft causes the winding support 3 to rotate, which is received on the receiving shaft 13 in such a way as to prevent relative rotation between the receiving shaft 13 and the winding support 3. The receiving shaft can have a clamping device for fixing the winding support 3. It is also possible to provide winding supports that already have a shaft or are connected to the shaft. In this case, the shaft of the winding support can be received on the receiving device 2 at its outer diameter, for example in a clamping device.

[0061] Figure 7 A detail view of the winding machine 1 is shown from the side. Figure 8 The side view is shown in section. Figure 9 It is a detailed view of the winding machine 1 cut from this side.

[0062] Figure 10 Another winding machine 1 is shown. Compared with Figure 1 the winding machine 1 shown in Figure 10 the winding machine according to Figure 11 has a robot arm 14 on which a processing device 15 for the wire end is arranged. A detail view is shown in which the arrangement of the processing device 15 at the winding support 3 received in the receiving device 2 can be seen.

[0063] With the aid of the processing device 15, the starting end of the winding wire of the sub-winding is fixed at the contact position of the winding support 3, whereby the winding process can start with the mechanical pulling of the wire necessary for the winding process. The contact position is an electrical contact position into which the wire, preferably with the insulation removed, is placed. After the wire is placed in the contact position by means of the winding device 4, the processing device 15 is used to crimp the contact position in order to mechanically fix the wire in the contact position. Then, the processing device 15 grabs and cuts off any possible remaining wire excess protruding from the contact position on the side not leading to the coil. Only after that does the wire supply and the winding process start. In the illustrated embodiment, the winding machine 1 has only one robot arm 14 including the processing device 15. For this reason, the fixing process will be carried out successively for a plurality of winding devices 4. Similarly, this also applies to the mechanical fixing of the end of the wire of the sub-winding, only in reverse. The winding device 4 places the end in the corresponding contact position. Then, the processing device 15 crimps or curls the contact position to mechanically fix the wire. Then, the processing device 15 cuts off the connecting wire on the side not leading to the coil between the contact position and the wire conveying device 6. Thus, the winding process of the sub-coil is completed. This process is also carried out successively for a plurality of winding devices 4.

[0064] It can be provided that the starting end is placed in the contact element without leaving a significant excess and then the contact element is crimped. Thus, the winding process can start immediately without first grasping the wire end with the robot unit, cutting the wire and discarding the waste. Therefore, a working method without wire loss can be provided in which wire sections are not cut off and discarded.

[0065] The aforementioned functions of the processing device 15, especially the functions coordinated with the working method without wire loss, can be provided for various different embodiments of the winding machine according to the present disclosure, especially also for embodiments different from those shown in the figures. Here, these functions can also be provided in other ways different from those with the aid of the processing device 15, especially by means of corresponding alternative devices, for example by means of a corresponding processing device for each winding device 4.

[0066] Having Figure 3a and Figure 3b The winding device 4 having the structural components shown in has an insulation stripping device 16 by means of which the insulation of the winding wire used can be removed. In particular, the insulation at the starting end and the end of the winding wire is removed by means of the insulation stripping device 16 in order to enable or facilitate contact of the coil winding, for example via the contact of the aforementioned contact position. In addition, according to Figure 3a and Figure 3bThe winding device has a wire clamping device 17 by means of which the winding wire can be clamped to prevent the wire from moving in the conveying direction or in the direction opposite to the conveying direction. In particular, it can be provided that the winding wire is clamped when no winding movement takes place, and the wire is released by the wire clamping device 17 only after the starting end of the wire has been clamped in the contact position, and that the wire is clamped by means of the wire clamping device 17 before being cut off after the end end has been fixed in the contact position.

[0067] Figure 12 Fig. 1 shows a winding machine 1 having a wire storage 18 in the form of a wire reel, from which the respective winding wire is fed to the respective winding device 4, and the winding wire is wound around the teeth 5 of the winding support 3 by means of the associated winding device 4.

[0068] Figure 13 Fig. 8 shows a winding installation 19 according to the present disclosure. The winding installation is formed by two winding machines 1 which are arranged opposite one another such that the longitudinal axis of the receiving device 2 and thus the axis of rotation of the winding support 3 received thereon are oriented parallel. Thus, in the winding installation 19, coil windings can be established in parallel in time on two winding supports 3, wherein coil windings are established simultaneously on a plurality of teeth 5 on each of the winding supports 3.

[0069] The features disclosed in the foregoing description, claims and drawings are significant for the implementation of various different embodiments not only individually but also in any combination.

Claims

1. A winding machine (1) for establishing a coil winding on a winding support (3) of an outer slot type of a rotor or a stator of an electric machine, the winding machine having: - A receiving device (2) for receiving the outer groove-shaped winding bracket (3), wherein, The receiving device (2) has a longitudinal axis which, in a state where the outer slot type winding support (3) is received on the receiving device (2), lies on the longitudinal axis of the outer slot type winding support (3); And - A plurality of winding devices (4) arranged around the receiving device (2), Wherein, - Each winding device (4) has a wire feeding device (6) which is configured to move the winding wire in a feeding direction and thus guide it towards the receiving device (2); - Each winding device (4) has a drive system which is configured to move the wire feeding device (4) relative to the receiving device (2) and independently of the wire feeding devices of other winding devices (4) during the feeding movement of the winding wire in a manner according to the winding movement such that the winding wire is wound around the winding teeth (5) of the outer slot type winding support (3) received on the receiving device (2) to form a coil winding; And - The receiving device (2) has a rotary drive device (10) by means of which the receiving device (2) can be rotated around the longitudinal axis of the receiving device, and the rotary drive device is configured to rotate the receiving device (2) according to the winding movement such that the corresponding winding wire is wound around the relevant winding teeth (5) of the outer slot type winding support (3) received on the receiving device (2) to form a corresponding coil winding.

2. The winding machine (1) according to claim 1, wherein, The winding machine (1) has at least three winding devices (4).

3. The winding machine according to claim 1 or 2, wherein, The winding devices (4) are arranged around the receiving device (2) evenly distributed with respect to the periphery of the winding support (3) to be arranged in the receiving device (2).

4. The winding machine (1) according to at least one of the preceding claims, wherein, The receiving device (2) has a workpiece support (12) which is configured to receive the outer slot type winding support (3) and is arranged in the winding machine (1) in a releasable manner so as to enable the transportation of the outer slot type winding support (3) received on the workpiece support (12) to and from the winding machine (1).

5. The winding machine (1) according to at least one of the preceding claims, wherein, For each winding device (4), the drive system is configured to move the wire feeding device (6) relative to the receiving device (2) according to the winding movement - In a first direction extending parallel to the longitudinal axis of the receiving device (2); And - In a second direction extending perpendicular to the longitudinal axis of the receiving device (2) and passing through the longitudinal axis of the receiving device (2).

6. The winding machine (1) according to at least one of the preceding claims, wherein, Each winding device (4) can move in a third direction which extends perpendicular to the first direction and perpendicular to the second direction.

7. The winding machine (1) according to at least one of the preceding claims, wherein, For each of these winding devices (4), the drive system is configured such that the wire feed device (6) swings about a swing axis which extends perpendicular to the longitudinal axis of the receiving device (2) and at a distance from the longitudinal axis.

8. The winding machine (1) according to at least one of the preceding claims, wherein, Each of these winding devices (4) has an insulation stripping device which is configured to remove the insulation of the wound wire.

9. The winding machine (1) according to at least one of the preceding claims, wherein, Each of these winding devices (4) has a wire clamping device which is configured to clamp the wound wire and thereby prevent the wound wire from moving in the feed direction.

10. The winding machine (1) according to at least one of the preceding claims, wherein, In each winding device (4), at least one preforming element (7) which is movable relative to the wire feed device (6) of the winding device (4) is provided, and the preforming element is movable between a rest position and an intervention position, wherein the preforming element (7) can apply a lateral force to the wound wire in its intervention position and thereby apply an elastic to plastic prestress, and when hitting the winding support (3) received on the receiving device (2) and when gradually forming a coil winding, the prestress will continuously affect the characteristics of the wound wire in such a way that it completely or sufficiently partially compensates for the tendency of the laid wound wire to form bulges between the bending points.

11. The winding machine (1) according to at least one of the preceding claims, wherein, The receiving device (2) is configured to receive the outer trough-shaped winding support (3) of the traction drive device, and each winding device (4) is configured to form a coil winding around the winding teeth of the outer trough-shaped winding support (3) of the traction drive device.

12. A winding facility (17) having a plurality of winding machines (1) according to at least one of the preceding claims, wherein, The winding machine (1) is configured to simultaneously build coil windings on the corresponding outer trough-shaped winding supports (3) of the rotor or stator of the electric motor in the winding facility (17).

13. A method for building a coil winding on an outer trough-shaped winding support (3) of a rotor or stator of an electric motor, the method comprising the following steps: - Receiving the outer trough-shaped winding support (3) on the receiving device (2) of the winding machine (1) such that the longitudinal axis of the receiving device (2) lies on the longitudinal axis of the outer trough-shaped winding support (3); and - Using a plurality of the winding devices (4) arranged around the receiving device (2) of the winding machine (1) to simultaneously form a plurality of coil windings around the corresponding winding teeth (5) of the outer trough-shaped winding support (3), wherein, in order to form the corresponding coil windings using the corresponding winding devices (4), - Moving the wound wire in the feed direction by means of the wire feed device (6) of the relevant winding device (4) so as to feed the wound wire to the relevant winding teeth (5), - During the feed movement of the wound wire, the wire feed device (6) of the relevant winding device (4) moves according to the winding movement relative to the relevant winding teeth (5) by means of the drive system of the relevant winding device (4) and independently of the wire feed devices (6) of the other winding devices (4), and thus winds around the relevant winding teeth (5), and - The outer groove-shaped winding bracket (3) is rotated according to a winding motion by the rotary drive device (10) of the accommodating device (2), such that the corresponding winding wire is wound around the relevant winding teeth (5) of the outer groove-shaped winding bracket to form a corresponding coil winding.

14. The method according to claim 13, wherein, A coil winding is established on the outer groove-shaped winding bracket (3) of the rotor or stator of the traction drive device.

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