WINDING MACHINE

Abstract

A winding machine, including a receiving element for receiving a base body including teeth onto which a winding is to be wound, a nail winding head through which a wire can be guided in parallel to a surface of each tooth in order to place the wire inside a groove between two teeth of the base body, so that the tooth can be wound with the wire, and at least one retaining finger, wherein the wire can be positioned inside the groove by the retaining finger independently of the nail winding head in order to determine a target location of the wire inside the groove.

Claims

1. A winding machine comprising a receiving element for receiving a base body comprising teeth onto which the winding is to be wound, a nail winding head through which a wire can be guided in parallel to a surface of each tooth through the base body in order to place the wire inside a groove between two teeth of the base body, so that a wire can be wound around a tooth to be wound, wherein the nail winding head has a nail support at which a needle-shaped nozzle is attached, via which a wire to be wound can be output, wherein the nozzle can be arranged transversally inside the groove, so that a distance of the nozzle to the tooth to be wound is smaller than to an adjacent tooth that delimits the groove.

2. The winding machine according to claim 1, wherein the nozzle can be aligned in parallel to a side surface of the tooth to be wound that delimits the groove.

3. The winding machine according to claim 1, wherein the nozzle can be rotated relative to the receiving element about a processing axis by means of the nail support, and can be linearly displaced along the as well as perpendicular to the processing axis in three independent spatial directions, wherein the wire can be output perpendicular to the processing axis through the nozzle, and wherein the receiving element is in particular rotatable about a rotational axis that is parallel to the processing axis.

4. The winding machine according to claim 1, wherein: at least one pin-shaped retaining finger, which can be moved relative to the receiving element in three independent spatial directions independently of each other, wherein the wire can be positioned inside the groove independently of the nail winding head by the retaining finger to determine a target location of the wire inside the groove.

5. The winding machine according to claim 1, wherein the nozzle can be guided through the nail support outside of the groove, and the retaining finger is formed for positioning the wire inside the groove in order to realize the winding and/or in that the nozzle can be guided through the nail support inside the groove to position the wire in order to realize the winding.

6. The winding machine according to claim 1, wherein respectively one retaining finger can be arranged on respectively one front side of the base body, wherein the retaining fingers are in particular mechanically coupled.

7. A method for manufacturing a winding on the teeth of a base body, comprising the steps of: placing a wire at a start position at a first front side of the base body at a tooth to be wound by means of a needle-shaped nozzle that is attached at a nail support of a nail winding head, wherein the start position is arranged at a groove inside of which the wire is to be placed, and wherein the nozzle is arranged closer to the tooth to be wound than to an adjacent tooth that delimits the groove, moving the nail winding head along the groove to place the wire inside the groove, wherein the alignment of the nozzle remains unchanged, and placing the wire at a target position at a second front side that is located opposite the first front side, wherein a target location of the wire inside the groove is defined by the start position and the target position.

8. The method according to claim 7, wherein the nozzle is aligned for placing the wire at the start position and/or for moving the nail winding head in parallel to a side surface of the tooth to be wound that delimits the groove.

9. The method according to claim 7, wherein the nozzle is rotated about a processing axis relative to the base body by the nail support and is linearly displaced perpendicular to the processing axis, and wherein in particular the base body is rotated about a rotational axis that is parallel to the processing axis to arrange the nozzle closer to the side surface of the tooth to be wound than to the adjacent tooth that is located opposite the side surface.

10. The method according to claim 7, wherein: the wire is placed at the start position at the first front side of the base body by means of a pin-shaped retaining finger, wherein the nail winding head, in particular the nozzle, remains outside of the groove, the nail winding head, in particular the nozzle, remains outside of the groove when it is moved along the groove to place the wire inside the groove, and the wire is placed at the target position at the second front side by means of a further pin-shaped retaining finger, wherein the nail winding head, in particular the nozzle, remains outside of the groove.

11. The method according to claim 10, wherein, following the placement of the wire at the target position at the second front side, the following steps are performed: moving the nail winding head to an adjacent groove, placing the wire at a start position at the second front side of the base body by means of the further retaining finger, wherein the nail winding head, in particular the nozzle, remains outside of the adjacent groove, moving the nail winding head in parallel to the adjacent groove, wherein the nail winding head, in particular the nozzle, remains outside of the adjacent groove to place the wire inside the adjacent groove, and placing the wire at a target position at the first front side by means of the retaining finger, wherein the nail winding head, in particular the nozzle, remains outside of the adjacent groove, and wherein a target location of the wire inside the adjacent groove is defined by the start position and the target position.

12. A method for manufacturing a winding on teeth of a base body by means of a winding machine as previously described, wherein at first at least one bottom winding is applied to a tooth of the base body, and subsequently a top winding is applied to the bottom winding, comprising the steps of: placing the wire at a start position of a groove on a first front side of the base body by means of the nail winding head, moving the nail winding head in parallel to the groove to a second front side of the base body that is located opposite the first front side to place the wire inside the groove at a target location, wherein the nail winding head, in particular the nozzle, at least partially engages with the groove, moving the nail winding head at the second front side to an adjacent groove, and moving the nail winding head back to the first front side in parallel to the adjacent groove in order to place the wire inside the adjacent groove at a target location, wherein the nail winding head, in particular the nozzle, engages at least partially with the groove, placing the wires at a next start position of the groove at the first front side of the base body by means of the nail winding head, repeating all steps of the method and of the placement until all turns of the bottom winding are created, winding the top winding according to the method according to claim 7.

Description

SHORT DESCRIPTION OF THE DRAWINGS

[0021] In the following, exemplary embodiments of the invention are described in detail by referring to the accompanying drawing. Herein:

[0022] FIG. 1 shows a schematic overview of the winding machine according to an exemplary embodiment of the invention,

[0023] FIG. 2 shows a schematic detailed view of the winding machine according to the exemplary embodiment of the invention during the winding of a winding,

[0024] FIG. 3 shows a schematic detailed view of the nail winding head of the winding machine according to the exemplary embodiment of the invention,

[0025] FIG. 4 shows a schematic detailed view of the retaining fingers of the winding machine according to the exemplary embodiment of the invention, and

[0026] FIG. 5 shows a schematic sectional view through the winding machine according to the exemplary embodiment of the invention.

EMBODIMENTS OF THE INVENTION

[0027] FIG. 1 schematically shows a winding machine 1 according to an exemplary embodiment of the invention. The winding machine 1 comprises a receiving element 11. A base body 4 of a stator or of a rotor can be inserted into the receiving element 11. The winding machine 1 is configured for the purpose of winding a wire 8 onto the teeth 3 of the base body 4 that is inserted into the receiving element 11. For this purpose, a nail winding head 5 is provided. The nail winding head 5 comprises a nail support 6 and a nozzle 7. The nozzle 7 is formed so as to be needle-shaped and attached at a nail support 6. The nozzle 7 is movable by means of the nail support 6. In particular, a processing axis 100 is defined along which the nail winding head 5 can be moved so that the nail support 6 can linearly displace the nozzle 7 along the processing axis 100. The nozzle 7 extends perpendicularly to the processing axis 100, so that the wire 8 can be output perpendicularly to the processing axis 100. Further, it is provided that the nozzle 7 is rotatable about the processing axis 100.

[0028] The processing axis 100 is in particular aligned in parallel to the central axis (not shown) of the base body 4. To achieve an optimal placeability of the wire 8 at the base body 4, it is additionally provided that the nail winding head 5 can be displaced in at least one spatial direction perpendicularly to the processing axis 100.

[0029] Further, the receiving element 11 has a rotary drive 14 and a pivot drive 15. Through the rotary drive 14, it becomes possible to rotate the base body 4 about its central axis. Through the pivot drive 15, it becomes possible to pivot the base body 4 perpendicularly to its central axis and thus perpendicularly to the processing axis 100. In this manner, necessary relative alignments of the nozzle 7 and the base body 4 can be achieved.

[0030] In order to apply a winding to the tooth 3, the nozzle 7 can be inserted through the nail support 6 into a groove 10 (cf. FIG. 2) between two teeth 3. In this manner, a winding 2 can be wound onto the teeth 3 of the base body 4 by means of a conventional needle winding technique.

[0031] If a certain number of turns is wound onto a tooth 3, the nozzle 7 can no longer be inserted into the groove 10 adjacent in the tooth 3 without colliding with the already wound turns. This would lead to damage to the already wound wire 8, which is why the winding procedure has to be stopped, even if enough room for further turns is available inside the groove 10.

[0032] To apply further turns to the tooth 3, a pair of retaining fingers 9 is provided. The retaining fingers 9 are formed to be L-shaped, wherein one leg of the L-shape extends in parallel to the processing axis 100. The retaining fingers 9 can be moved in three spatial directions 200, 300, 400 independently of each other. Thus, each retaining finger 9 can be placed in any desired manner relative to the base body 4.

[0033] FIG. 2 schematically shows the use of the retaining finger 9 at a first front side 12 of the base body 4. Thus, it is preferably provided that the two retaining fingers 9 are mechanically coupled and have a predetermined distance to each other. This distance is greater than a length of the base body along its central axis, and thus greater than a distance from a first front face 12 and an opposite second front face 13 of the base body. Thus, the retaining fingers 9 can be placed outside of the base body 4 respectively at the first front side 12 and the second front side 13.

[0034] If further turns are to be applied to an already existing winding of a tooth 3, the nozzle 7 cannot engage in the groove 10 between two teeth 3, since that would lead to a collision with already wound wires 8, as previously described. Therefore, the nozzle 7 remains outside of the groove 10, wherein the wires 8 are placed through the retaining finger 9 at the same time. In particular, this means that a radial position of the wire 8 with respect to the central axis of the base body 4 is determined by the retaining finger 9. In this manner, the nozzle 7 can be moved at another radial position, in particular outside of the groove 10, wherein the wire 8 is at the same time placed at the desired radial position, in particular inside the groove 10. If the nozzle 7 is moved up to the front side 13, the nozzle 7 can be moved axially (with respect to the central axis of the base body 4) outside of the base body 4 to a target position in order to move the wire 8 to a desired target location inside the groove 10. Subsequently, the wire 8 can be correspondingly placed at the second front side 13 for being arranged in an adjacent groove 10 by the retaining finger 9, so that the nozzle 7 can be moved back to the first front side 12, wherein the nozzle 7 again remains outside of the groove 10, while the wire 8 is placed inside the groove 10 due to the retaining finger 9. Thus, additional turns can be wound onto each tooth 3, whereby a groove filling factor is raised. The groove filling factor represents the ratio of a cross-sectional surface of the groove 10 to the entire cross-sectional surface of the existing winding inside the groove 10.

[0035] It is particularly advantageous if the placement of the wire 8 inside the groove 10 thus comprises three steps: At first, the nozzle 7 is transferred outside of the base body 4 to a desired radial position. This desired radial position corresponds to that radial position at which the wire 8 is to be placed inside the groove 10. As the nozzle 7 is located outside of the base body 4, meaning axially outside of the base body 4, there is no danger of a collision with existing windings 2. Subsequently, the wires 8 are supported at the desired radial position by means of the retaining finger 9. Alternatively or additionally, the wire 8 can also be positioned at the radial position by the retaining finger 9 itself. Subsequently, at first the nozzle is moved radially in the direction of the central axis of the base body 4 in order to move the nozzle in parallel to the processing axis 100 and thus in parallel to the central axis of the base body 4. If the teeth 3 are attached transversally at the base body 4, the base body 4 is at the same time rotated by means of the rotary drive 14. Since the nozzle 7 has been radially moved previously, the nozzle 7 is located outside of the groove 10 during the entire displacement in parallel to the central axis. As soon as the nozzle 7 has been moved along the entire groove 10 and is again arranged axially outside of the base body 4, another radial movement is performed to achieve a radial target position of the wire 8 also at the second front side 13. Since the nozzle 7 is located outside of the base body, a collision with existing windings 2 is again excluded. Thus, the wire 8 has been placed at a desired position inside the groove 10 without the nozzle 7 itself having to be arranged inside the groove 10.

[0036] Advantageously, the winding 2 is wound in two parts. For this purpose, at first a bottom winding is wound, and subsequently a top winding is wound onto the bottom winding. The retaining finger 9 is not necessary for winding the bottom winding. Instead, for winding the bottom winding it is provided that the nozzle 7 engages with the groove 10, and thus places the wire 8 inside the groove 10. To achieve an optimal placement of the wire 8 inside the groove 10, the nozzle 7 can be rotated about the processing axis 100, as has already been described. The advantage of this movement is shown in FIG. 3. The retaining finger 9 can in particular also be movable vertically, which in the Figures corresponds to the spatial direction 200, in order to pull the wire 8 in the requited position.

[0037] On the top side, FIG. 3 schematically shows a drawing in which the nail support 6 the nozzle 7 does not engage transversally with the groove 10, and thus a distance of the nozzle 7 to the two teeth 3 that delimit the groove is the same. Schematically shown on the bottom side is the case that the nail support 6 has aligned the nozzle 7 transversally to the groove 10 by means of a rotational movement and a translatory movement with respect to the processing axis 100. Due to this rotation and translation, it is facilitated for the nozzle 7 to be inserted transversally into the groove 10 and in particular to be aligned in parallel to the tooth to be wound 3. This leads to a reduction of the distance X between the exit point of the wire 8 from the nozzle 7 and the surface of the tooth to be wound 3. Through this reduced distance X, the wire 8 can be positioned inside the groove in a highly accurate manner. Thus, the bottom winding can be manufactured according to a very precise pattern. The position that is shown in the bottom drawing of FIG. 3 can in particular be achieved by rotating the nozzle 7 about the processing axis 100 while an additional translation is being performed in the course of which the processing axis 100 is radially displaced with respect to the central axis of the base body 4. Further, the base body 4 is rotated about its central axis. Through the superimposition of these movements, an alignment as shown in the bottom of FIG. 3 is possible. Alternatively, the nail support 6 can also displace the nozzle 7 in two independent directions perpendicular to the processing axis 100 and rotate it about the processing axis 100 to align the nozzle 7, as shown at the bottom of FIG. 3. In this case, no rotation of the base body is required.

[0038] Thus, by means of the winding machine 1, a winding 2 can be attached at the base body 4 in a very precise manner. In particular, a plurality of turns can be wound onto the teeth 3 of the base body 4, wherein a higher number of turns as compared to the state of the art can be achieved, in particular in the case of solid sheet metal cutting.

[0039] FIG. 4 shows a schematic partial view of the retaining fingers 9. FIG. 5 shows a schematic sectional view through a portion of the winding machine 1. As can in particular be seen in FIG. 5, the teeth 3 of the base body 4 are chamfered and thus do not extend in parallel to the central axis of the base body 4. Thus, a rotation of the base body 4 by means of the rotary drive 14 is necessary during the winding procedure in order to guide the nozzle 7 in parallel to a groove 10 between the teeth 3.

[0040] Thus, the winding 2 can be manufactured by means of the winding machine 1 according to the exemplary embodiment of the invention. In the following, a method according to an exemplary embodiment of the invention is described by means of which the winding 2 can be wound onto the teeth 3 of the base body 4:

[0041] At first, the bottom winding is wound. For this purpose, the wire 8 is placed at a start position at the first front side 12 of the base body 4. This is realized in particular by means of the nozzle 7 being located at the first front side 12 of the base body 4 outside of a groove 10. The start position in particular corresponds to a radial position that is predetermined with respect to the central axis of the base body 4. Two adjacent grooves 3 are assigned to the tooth to be wound 3. Thus, the nozzle 7 is moved through one of the grooves 10 to place the wire inside the groove 10 in a target location. At that, the nozzle can be aligned in parallel to the surface of the tooth to be wound 3 by means of the rotatable nozzle 7. The nozzle 7 is subsequently moved at the second front side 13 of the base body 4 to an adjacent groove 10 which is also assigned to the tooth to be wound 3. Subsequently, the nozzle 7 is moved in the adjacent groove 10 to pace the wire 8 inside the adjacent groove 10 at a target location. Then, the nozzle 7 is again positioned at the first front side 12. Thus, the nozzle 7 is moved back to the original groove 10, and the wire 8 is placed at a next start position at the first front side 12. Subsequently, these steps are performed until all turns of the bottom winding are applied to the tooth 3.

[0042] Following the winding of the bottom winding, the top winding is wound. For winding the top winding, the nozzle 7 can no longer engage into the groove 10, as this would lead to a collision with the already wound turns of the bottom winding. Thus, the nozzle 7 is moved axially outside of the base body 4 to a start position. A placement of the wire at a desired start position is performed together with the retaining finger 9 at the first front side 12 of the base body. In particular, the said start position is a radial position relative to the central axis of the base body 4. The nozzle 7 is subsequently moved in parallel to the groove 10, wherein the nozzle 7 remains outside of the groove 10. By contrast, the wire 8 is placed inside the groove 10 since the wire 8 had been held in the start position by the retaining finger 9. As soon as the nozzle 7 has reached the second front side 13 of the base body 4, the nozzle 7 is radially moved to a target position. As the nozzle 7 is located axially outside of the base body 4, there is again no danger of any collision with the turns of the bottom winding. Though the radial movement, the wire 8 is placed at a target position at the second front side 13. As a result, the entire wire 8 reaches a target location inside the groove 10.

[0043] Subsequently, the nozzle 7 is moved to an adjacent groove 10. Here, a placement of the wire 8 at the start position is again performed by additionally using the retaining finger 9, wherein the nozzle 7 again remains outside of the base body 4, and thus again does not engage with the adjacent groove 10. Placement of the wire 8 inside the adjacent groove is performed in the same manner as previously described for the groove 10. Thus, winding of the top winding is performed by means of the retaining finger 9 of the winding machine 1, so that the top winding can be attached in a safe and reliable manner. Thanks to the top winding, the groove filling factor of the winding is increased as compared to the state of the art.