Tool for separating and crossing wire ends of a winding and method for producing a winding

Abstract

The invention relates to a tool (100) for separating and crossing wire ends (118) of a winding, wherein the winding is formed by a plurality of wire elements forming the wire ends, the tool comprising a first and a second tool part (130, 160), wherein the first tool part (130) has a plurality of first receptacles (132) on its inner periphery (139) facing the second tool part (160) for accommodating a plurality of first wire ends, and wherein the second tool part has a plurality of second receptacles (162) on its outer periphery (169) facing the first tool part for accommodating a plurality of second wire ends, the first and second tool parts being twistable relative to each other in a peripheral direction (106) of the tool for crossing the wire ends, wherein a plurality of radially oriented loading tabs (155) are arranged in the peripheral direction between the plurality of first receptacles and / or the plurality of second receptacles for spacing the wire ends apart in a radial direction (104) of the tool.

Description

Technical Field

[0001] The invention relates to a tool for separating and crossing wire ends of a winding of an electric machine, wherein the winding is formed from a plurality of wire elements forming the wire ends. Background Art

[0002] The prior art already discloses tools for separating and for crossing the ends of wire elements for producing windings for electric motors. In the separating tool, the respective wire ends of the wire elements are radially spaced apart from one another. After separation, the wire elements are removed from the separating tool and placed in the crossing tool for crossing. During crossing, the radially outer and inner wire ends are bent relative to one another in the crossing tool. Alternatively, the two processes can be performed in reverse order, so that separation can also be performed after crossing. Summary of the Invention

[0003] The invention relates to a tool for separating and crossing wire ends of a winding of an electric machine, wherein the winding is formed by a plurality of wire elements forming the wire ends, the tool having a first and a second tool part arranged concentrically with one another, wherein the first tool part has a plurality of first groove-shaped receptacles on its inner circumference facing the second tool part for accommodating a plurality of first wire ends, and wherein the second tool part has a plurality of second groove-shaped receptacles on its outer circumference facing the first tool part for accommodating a plurality of second wire ends, wherein the first and second tool parts can be twisted relative to each other in the circumferential direction of the tool for crossing the wire ends, and wherein a plurality of radially oriented loading tabs are arranged in the circumferential direction between the plurality of first groove-shaped receptacles and / or the plurality of second groove-shaped receptacles for spacing the wire ends apart in the radial direction of the tool.

[0004] The present invention thus makes it possible to provide a single tool in which the separation and crossing of the wire ends of the wire elements can be achieved, wherein complex and time-consuming tool changes can be avoided.

[0005] The first tool part and / or the second tool part preferably have action tabs.

[0006] Thus, a compact tool can be provided in which pre-separation of the wire ends can be achieved simply and uncomplicatedly.

[0007] According to one embodiment, a separating element that is movable in the axial direction of the tool is provided for forming a gap between the first and second plurality of wire ends in the radial direction of the tool.

[0008] A gap can thus be formed safely and reliably, which gap can preferably be used as an electrical separation plane in a winding to be produced accordingly.

[0009] Preferably, an actuating element for moving the separating element in the axial direction of the tool is assigned to the separating element.

[0010] This makes it possible to actuate the separating element in a simple manner.

[0011] Preferably, a first and a second intermediate tool part are arranged between the first and the second tool part in the radial direction of the tool, and the first and the second intermediate tool parts respectively have a plurality of radial through holes in the peripheral direction of the tool for arranging the wire ends of a plurality of first and / or second wire ends, wherein the first and / or the second intermediate tool part respectively have at least partially radially oriented loading strips.

[0012] A robust and stable arrangement of the load tab on the tool for separating and crossing wire ends can thus be achieved in a simple and uncomplicated manner.

[0013] The plurality of groove-shaped first receptacles, the plurality of groove-shaped second receptacles and the plurality of radial through-holes are preferably each arranged uniformly and evenly spaced apart from one another in the circumferential direction of the tool and are provided in the same number.

[0014] This makes it possible to achieve a suitable arrangement of the wire ends on the tool for separating and crossing over in a simple manner.

[0015] Preferably, an actuating element for rotating in the circumferential direction of the tool is respectively assigned to the first and / or second tool part and the first and / or second intermediate tool part.

[0016] Thus, an uncomplicated and comfortable handling is possible, wherein each tool part or intermediate tool part can be twisted individually.

[0017] According to one embodiment, the first tool part and the first intermediate tool part as well as the second tool part and the second intermediate tool part are each rotatable synchronously with one another for crossing the wire ends.

[0018] A safe and reliable crossing can thus be achieved, wherein the wire ends assigned to the first tool part and the first intermediate tool part and the wire ends assigned to the second tool part and the second intermediate tool part can each be bent or crossed together.

[0019] Furthermore, the present invention provides a method for producing a winding for an electric machine, the method comprising the following steps:

[0020] a) arranging the wire ends at least partially in associated groove-shaped receptacles of the tool, wherein a plurality of first wire elements are arranged in a plurality of first groove-shaped receptacles of a first tool part of the tool and / or a plurality of second wire ends are arranged in a plurality of second groove-shaped receptacles of a second tool part of the tool,

[0021] b) pre-separating the wire ends by twisting at least the first or second tool part of the tool for a first time in the peripheral direction of the tool, wherein the first and second plurality of wire ends are spaced apart in the radial direction,

[0022] c) separating the plurality of first and second wire ends by moving a separating element of the tool directed in an axial direction of the tool for forming a gap, in particular an electrical separating plane, and

[0023] d) Crossing the wire ends by twisting the first and / or second tool part of the tool a second time in the circumferential direction of the tool.

[0024] A method for producing a winding for an electric machine is thus provided, in which the wire ends of the winding are separated and crossed in a single tool.

[0025] Preferably, loading tabs are arranged on the first and / or second tool part, which loading tabs during pre-separation space the first and second wire ends apart in the radial direction by loading the wire ends into the associated groove-shaped receptacles and / or through-openings.

[0026] Thus, a pre-separation can be achieved in a simple manner.

[0027] According to one embodiment, the separating element penetrates into the tool in the axial direction of the tool during separation at least as far as the action web.

[0028] Therefore, pre-separation can be achieved easily and uncomplicatedly.

[0029] Preferably, a further separating step is provided, in which, after the at least one twisted first and / or second tool part has been rotated back into its starting position, a separating element is immersed in the tool in its axial direction beyond the action webs for widening the gap.

[0030] Thus, a suitable complete separation and a subsequent simplified crossover can be achieved.

[0031] Preferably, during the crossing, the first and the second tool part are twisted in opposite directions of rotation.

[0032] Therefore, the crossover can be achieved simply and uncomplicatedly.

[0033] An electric motor having a winding which is produced using the tool according to the invention is also advantageous. This electric motor can be produced particularly cost-effectively.

[0034] Furthermore, an electric machine having a winding is advantageous, wherein the winding is produced by the method according to the invention. Such an electric machine is particularly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be described in detail in the following description based on the embodiments shown in the accompanying drawings.

[0036] Figure 1 A perspective view showing a tool for separating and crossing wire ends and a stator with wire ends,

[0037] Figure 2 Shown Figure 1 Cross-section of the wire end in the tool before pre-separation,

[0038] Figure 3 Shows the Figure 2 Tools perspective in

[0039] Figure 4 Shown Figure 1 and Figure 2 Cross-section of the wire end in the tool during pre-separation,

[0040] Figure 5 Shows the pre-separation Figure 4 A perspective view of the tool,

[0041] Figure 6 Shown Figures 1 to 5 Cross-section of the wire end during separation in the tool,

[0042] Figure 7 Shows the separation Figure 6 A perspective view of the tool,

[0043] Figure 8 Shown Figures 1 to 7 Cross-section of the wire end in the tool during further separation,

[0044] Figure 9 Shows that upon further separation Figure 8 A perspective view of the tool,

[0045] Figure 10 shows a perspective view of the line ends after crossing,

[0046] Figure 11 Shown is a view from the first side Figures 1 to 9 A perspective view of the tool,

[0047] Figure 12 Shown is a view from a second side opposite to the first side. Figure 11 a perspective view of the tool; and

[0048] Figure 13 An electric machine produced according to the method according to the invention using the tool according to the invention is shown. DETAILED DESCRIPTION

[0049] In the figures, elements having the same or similar functions are provided with the same reference symbols and are described more precisely only once.

[0050] Figure 1 A winding having first and second axial ends 101, 102 for separating and crossing windings for an electric machine is shown. Figure 10 A tool 100 for forming a wire end 118 of a stator core 110 having a plurality of wire elements 116 that configure the wire end 118 and form a winding ( Figure 10 600 in FIG. ). According to one embodiment, line element 116 is configured in a U-shape. Here, two of line ends 118 are respectively assigned to line element 116. Alternatively, line element 116 can also be configured in an I-shape, for example, wherein one line end 118 is respectively assigned to a single line element 116, etc.

[0051] The stator core 110 preferably has an at least approximately annular basic shape, with a plurality of slots 112 provided on its inner circumference. The slots 112 are designed to accommodate wire elements 116. Explanatoryally, insulation elements 114 are arranged in the slots 112. The insulation elements 114 are preferably designed as insulating paper.

[0052] according to Figure 1 In the embodiment shown, the slots 112 are formed on the inner circumference of the stator core 110 as described above. However, it should be noted that the slots 112 can also be formed on the outer circumference or as recesses in the stator core 110 .

[0053] Preferably, a predetermined number of wire elements of plurality of wire elements 116 are arranged in slots 112 along radial direction 104. Explanatoryally, so many wire elements of plurality of wire elements 116 are arranged in each slot 112 that exactly eight wire ends 118 extend from each slot 112.

[0054] The tool 100 is preferably configured for separating and crossing wire ends 118 and preferably comprises at least a first and a second tool part 130, 160, which are illustratively arranged concentrically with respect to one another. Preferably, the first and second tool parts 130, 160 can be twisted relative to one another along the circumferential direction 106 of the tool 100 for crossing the wire ends 118.

[0055] Here, the first tool part 130 preferably has a plurality of groove-shaped first receptacles 132 on its inner periphery 139 facing the second tool part 160 for accommodating a plurality of first wire ends ( Figure 2 Similarly, the second tool part 160 preferably has a plurality of groove-shaped second receiving portions 162 on its outer periphery 169 facing the first tool part 130 for receiving a plurality of second wire ends ( Figure 2 222 in the .

[0056] Preferably, radially oriented loading tabs 155 are arranged along circumferential direction 106 between first groove-shaped receptacles 132 and / or second groove-shaped receptacles 162. Radially oriented loading tabs 155 are configured to separate or space wire ends 118 along radial direction 104 of tool 100.

[0057] According to one embodiment, the first and / or second tool part 130, 160 has an action tab 155. In particular, the action tab 155 is arranged on the first and / or second tool part 130, 160, preferably formed integrally therewith. The first and second tool parts 130, 160 preferably each have an annular base body 131, 161. The groove-shaped receptacles 132, 162 of the first and second tool parts 130, 160 are arranged at the ends facing the second axial end 102 of the tool 100.

[0058] Furthermore, the tool 100 is preferably assigned a separating element 170 which is movable in the axial direction 105 of the tool 100. The separating element 170 has a cylindrical base body 171. Figure 4 The separating element 170 of 410) is constructed along the radial direction 104 of the tool 100 at a plurality of first and second wire ends ( Figure 2 Preferably, the separating element 170 has a web-shaped separating section 175 at its end facing the second axial end 102 of the tool 100 .

[0059] Preferably, each of the separating sections 175 is assigned a tip 176. A recess 172 is preferably arranged between two separating sections 175 adjacent in the peripheral direction 106. Furthermore, a recess or notch 177 is preferably arranged on the radial inner side of each of the separating sections 175.

[0060] The cutouts 177 are preferably used when the separating section 175 must be moved in the axial direction beyond the action tabs 155. In this case, it can be ensured that, during the subsequent crossing, the action tabs 155 can each penetrate into the corresponding cutouts 177 and thus the second intermediate tool part 150 can be twisted relative to the separating element 170.

[0061] Explanatory note, in the radial direction 104 of the tool 100, a first and a second intermediate tool part 140, 150 are arranged between the first and the second tool part 130, 160. The first and / or second intermediate tool part 140, 150 can alternatively also be integrated into the first and / or second tool part 130, 160 and, by way of example, each have an annular base body 141, 151. In addition, the first and the second intermediate tool part 140, 150 each have a plurality of through-holes 142, 152, which are configured in the radial direction 104 or are radial, for arranging a plurality of first and / or second wire ends ( Figure 2 220, 222). In this case, the first and / or second intermediate tool part 140, 150 each has a radially oriented load tab 155 at least partially.

[0062] Preferably, the load tab 155 can be arranged on the first and / or second tool part 130, 160 and / or on the first and / or second intermediate tool part 140, 150. Furthermore, the load tab 155 is preferably arranged on the end 159 of the first and / or second tool part 130, 160 facing the second axial end 102 and / or on the first and / or second intermediate tool part 140, 150.

[0063] Explanatory note, the load tabs 155 are arranged at the end 159 of the second intermediate tool part 150. The load tabs 155 can be arranged along the entire circumference of the respective component or the first and / or second tool part 130, 160 and / or the first and / or second intermediate tool part 140, 150. However, the load tabs 155 can also be arranged only in sections along the circumferential direction 106 on the first and / or second tool part 130, 160 and / or the first and / or second intermediate tool part 140, 150.

[0064] Preferably, the plurality of first groove-shaped receptacles 132, the plurality of second groove-shaped receptacles 162, and the plurality of radial through-holes 142, 152 are each uniformly and preferably evenly spaced apart from one another and provided in equal numbers along the circumferential direction 106 of the tool 100. Furthermore, the separating element 170 is preferably arranged between the first and second intermediate tool parts 140, 150. The receptacle 177 of the separating section 175 is preferably designed to accommodate the action tab 155 in sections.

[0065] In the manufacture of windings for motors ( Figure 10 In the method of 600), the tool 100 is arranged with its second axial end 102 in the axial direction 105 in the area of ​​the wire end 118. Figure 2211-218) are preferably at least partially arranged in the associated groove-shaped receiving portion 132, 162 or 132, 142, 152, 162 of the tool 100. In this example, a plurality of first wire ends ( Figure 2 220) are arranged in a plurality of groove-shaped first receiving portions 132 of the first tool part 130 of the tool 100, and / or a plurality of second wire ends ( Figure 2 222 ) are arranged in a plurality of groove-shaped second receptacles 162 of the second tool part 160 .

[0066] Subsequently, the wire ends are pre-separated by a first twisting of at least the first or second tool part 130 , 160 in the peripheral direction 106 of the tool 100 ( Figure 2 211-218 in ). Here, a plurality of first and second line terminals ( Figure 2 220 , 222 ) are spaced apart in the radial direction 104 .

[0067] Preferably, in the pre-separation, the loading tab 155 loads the plurality of first and second wire ends ( 118 ) in the radial direction 104 by loading the wire ends 118 into the allocated slot-shaped receptacles 132 and / or through-holes 142 . Figure 2 220 , 222 in FIG. 1 ). Furthermore, during the pre-separation, the separating element 170 is immersed in the tool 100 in the axial direction 105 at least until the action webs 155 are reached.

[0068] However, it should be noted that the movement of the separating element 170 until it reaches the load link 155 can also be applied individually enough to form the corresponding required gap. In this case, after the pre-separation, no further separation steps as described below are carried out, but instead complete separation has been achieved by the pre-separation.

[0069] In a further method step, the tool 100 is moved in a directed manner in the axial direction 105 for cutting the first and second wire ends ( Figure 2 A gap is formed between 220 and 222) ( Figure 4 410) of the separation element 170 to separate the plurality of first and second line terminals ( Figure 2 220, 222 in). Here, it is preferred to construct an electrical separation plane ( Figure 4 412 in the ).

[0070] For complete separation, after at least one of the twisted first and / or second tool parts 130, 160 has been rotated back into its initial position after pre-separation, the separating element 170 is preferably immersed in the axial direction 105 beyond the action tab 155 into the tool 100 in order to widen the gap ( Figure 4 410 in the ).

[0071] Subsequently, in a final method step, the crossing ends ( Figure 2 211-218 in FIG. 1 ). The first and second tool parts 130 , 160 are preferably twisted in opposite rotational directions when crossing.

[0072] Figure 2 Shown with wire end 118 Figure 1 The stator core 110 and Figure 1 The tool 100 includes first and second tool parts 130, 160, first and second intermediate tool parts 140, 150, and a separating element 170. Explanatory and exemplary, the plurality of wire ends 118 includes eight wire ends 211-218. The wire ends 211-218 are arranged in the radial direction 104. Here, the four radially outer wire ends 211-214 form a plurality of first wire ends 220, and the four radially inner wire ends 215-218 form a plurality of second wire ends 222.

[0073] The wire ends 211-218 are preferably at least partially arranged in the tool 100. Figure 2 In the basic position shown, the wire ends 217 and 218 are arranged in the receptacles 162 of the second tool part 160, and the wire ends 215 and 216 are arranged in the through-openings 152 of the second intermediate tool part 150. The wire ends 211-214 are preferably arranged in the region of the separating element 170.

[0074] also, Figure 2 The receptacle 299 formed by the receptacle 132 of the first tool part 130 and the through-opening 142 of the first intermediate tool part 140 is shown.

[0075] Figure 3 Shown Figure 2 The through hole 152 arranged in the second intermediate tool part 150 and Figure 1 The wire ends 215-218 are in the receptacles 162 of the second tool part 160. Figure 3 The arrangement of the wire ends 211 - 214 outside the receptacle 132 or through-opening 142 of the first tool part 130 or the first intermediate tool part 140 is shown. Figure 3 Shown Figure 1 The separating element 170 is illustratively arranged in the axial direction 105 (see Figure 1 ) is arranged above the line ends 211-218. In addition, it is preferred that the load tabs 155 assigned to the second intermediate tool part 150 are arranged in the peripheral direction 106 (see Figure 1 ) is arranged between the plurality of first and second line ends 220, 222.

[0076] Figure 4 Shown Figure 1 The stator core 110 together with Figure 2 The line ends 211-218 and Figure 1 Tools 100. Figure 4 , the second intermediate tool part 150 has been moved in the peripheral direction 106 (see Figure 1 ) is twisted so that the wire ends 211-214 are loaded into the through-holes 142 through the loading tabs 155. This represents the pre-separation process.

[0077] For example, along Figure 1 The stator is twisted in the circumferential direction 106, exemplarily by approximately 3° counterclockwise. However, it should be noted that the corresponding rotation angle can vary depending on the type of stator being manufactured, and the 3° angle described here is merely exemplary and should not be considered a limitation of the present invention. A gap 410 is formed between the wire ends 214 and 215. Preferably, the gap 410 is formed between the first and second wire ends 220 and 222.

[0078] Explanatory note is that the gap 410 is formed such that two equal numbers of wire ends 211 - 218 are separated from one another. However, it should be noted that the gap 410 can also be formed at any other position along the radial direction 104 .

[0079] Furthermore, it is also possible to produce multiple gaps 410 and / or separating planes 412 within the tool 100. The gaps 410 and / or separating planes 412 can be produced by multiple additional tool parts or intermediate tool parts having action webs 155 or separating elements 170 with different diameters. This increases the number of required tool parts and / or intermediate tool parts.

[0080] Figure 5 Shown Figure 4 The pre-separated wire ends 211-218 are loaded radially outwards in the radial direction 104 or into the through-hole 142 via the loading tab 155. Figure 5 The wire ends 215 and 216 are shown twisted by twisting the second intermediate tool part 150 in the peripheral direction 106. Preferably, the second intermediate tool part 150 and the second tool part 160 are twisted synchronously with each other so that Figure 5 The center wire ends 215 - 218 are arranged together in a twisted manner relative to the wire ends 211 - 214 in the peripheral direction 106 .

[0081] Figure 6 The separate steps of the production method according to the first variant are shown, wherein: Figure 1The separating element 170 is immersed in the gap 410 . In this process, the tip 176 of the separating element 170 loads the wire ends 211 - 214 into the receptacle 132 or the through-opening 142 .

[0082] Preferably, the tip 176 is oriented with its end facing the load tab 155 in the axial direction 105 (see Figure 1 ) is arranged on the load web 155. The gap 410 is enlarged by the separation according to the first variant, so that preferably an electrical separation plane 412 is formed.

[0083] Figure 7 Shown Figure 6 The separated wire ends 211-218, wherein the wire ends 211-214 are as in Figure 6 As described in the above, the separation element 170 is loaded into the receiving portion 132 or the through hole 142. In addition, Figure 7 Wire ends 215 - 218 are shown twisted in circumferential direction 106 relative to wire ends 211 - 214 .

[0084] Figure 8 An alternative and optional separation step according to a second variant is shown, in which the second intermediate tool part 150 is twisted back to Figure 2 In the initial position, Figure 1 The separating element 170 can be moved in the axial direction 105 (see Figure 1 ) is inserted into the gap 410 beyond the load link 155, in particular next to the load link. Wire ends 211-214 are thereby loaded further into the receptacles 132 or through-openings 142. The disconnecting element 170 is preferably arranged with its receptacle 177 in the region of the load link 155, wherein the disconnecting element 170 remains in this position even during subsequent crossings.

[0085] Figure 9 Shown Figure 8 and shows the arrangement of the separating section 175 between two adjacent load tabs 155 of the second intermediate tool part 150 in the circumferential direction 106. Figure 2 In the basic position, the wire ends 211 - 218 are arranged at the same height in the radial direction 104 or are oriented not offset with respect to one another.

[0086] Figure 10 Shown Figure 1 The stator core 110 and the stator core 110 after the crossover Figure 2Wire ends 211-218. During the crossing, the first tool part 130 and the first intermediate tool part 140 are preferably twisted together in the circumferential direction 106, and / or the second intermediate tool part 150 and the second tool part 160 are twisted in opposite circumferential directions 106. By way of example, the twisting in the circumferential direction 106 is, for example, 5°. However, it should be pointed out that the corresponding rotation angle can vary depending on the type of stator to be produced, and the angle of 5° described here is merely exemplary and should not be considered as a limitation of the present invention. In this case, the first tool part 130 and the first intermediate tool part 140, as well as the second tool part 160 and the second intermediate tool part 150, are each twisted synchronously with one another.

[0087] Exemplarily, the winding 600 is formed by crossing. Explanatoryally, Figure 10 In FIG. 1 , the wire ends 211-214 are bent or crossed counterclockwise, and the wire ends 215-218 are bent or crossed clockwise. A gap 410 is formed between the wire ends of the plurality of first wire ends 220 and the wire ends of the plurality of second wire ends 222. When crossing, the loading tab 155 moves along the peripheral direction 106 through the receiving portion 177 of the separation element 170 (see FIG. 1 ). Figure 9 ).

[0088] Figure 11 An exemplary embodiment of a tool 100 is shown, which has a first and a second tool part 130, 160, a first and a second intermediate tool part 140, 150 and Figure 1 The separation element 170 is provided.

[0089] Figure 12 Shown Figure 11 The tool 100 is shown and shows operating elements 530, 540, 550, 560, 570 for operating the first and / or second tool part 130, 160, the first and / or second intermediate tool part 140, 150 and / or the separating element 170. Preferably, the separating element 170 is assigned an operating element 570 for moving along the separating element 170. Figure 1 The separating element 170 is moved in the axial direction 105 of the actuator. Preferably, the operating element 570 is moved in the axial direction 105 by a cylinder.

[0090] Furthermore, an actuating element 530, 560, 540, 550 is respectively assigned to the first and / or second tool part 130, 160 and the first and / or second intermediate tool part 140, 150 for rotation in the peripheral direction 106. Preferably, the actuating element 530 is assigned to the first tool part 130 and the actuating element 560 is assigned to the second tool part 160. Furthermore, the actuating element 540 is assigned to the first intermediate tool part 140 and the actuating element 550 is assigned to the second intermediate tool part 150.

[0091] According to one embodiment, the operating elements 530, 560, 540, 550, 570 have an annular base. In addition, the operating elements 530, 540, 550, 560, 570 are preferably connected to the respectively assigned tool parts 130, 160, intermediate tool parts 140, 150 and / or separating element 170 via connecting elements, in particular pins and / or screws.

[0092] Furthermore, the operating elements 530, 540, 550, 560 are preferably arranged along Figure 1 The axial direction 105 in the embodiment of the present invention is fixed by a screw element. In addition, a pin for torque transmission is preferably arranged. Here, a form-locking force transmission for torque transmission is formed.

[0093] It should be noted that the first tool part 130 and the first intermediate tool part 140 can be rotated in the circumferential direction 106 by a common operating element, and / or the second tool part 160 and the second intermediate tool part 150 can be arranged rotatably in the circumferential direction 106 by a common operating element. Due to the provision of four operating elements 530, 540, 550, 560, the individual tool parts 130, 160 or intermediate tool parts 140, 150 can also be rotated individually and in different directions.

Claims

1. A tool (100) for separating and crossing wire ends of a winding (600) for an electric machine, wherein: The winding (600) is formed by a plurality of wire elements (211-218) forming wire ends, the tool having a first and a second tool part (130, 160) arranged concentrically with each other, wherein the first tool part (130) has a plurality of groove-shaped first receiving portions (132) on its inner periphery (139) facing the second tool part (160) for receiving a plurality of first wire ends, and wherein the second tool part (160) has a plurality of groove-shaped second receiving portions (132) on its outer periphery (169) facing the first tool part (130). Two receiving portions (162) are provided for receiving a plurality of second wire ends, wherein the first and second tool parts (130, 160) can be twisted relative to each other in a peripheral direction (106) of the tool (100) for crossing the wire ends, and wherein a plurality of radially oriented loading tabs (155) are provided between the plurality of groove-shaped first receiving portions (132) and / or the plurality of groove-shaped second receiving portions (162) in the peripheral direction (106) for spacing the wire ends in a radial direction (104) of the tool (100).

2. The tool according to claim 1, characterized in that The first tool part (130) and / or the second tool part (160) have the action tab (155).

3. The tool according to claim 1 or 2, characterized in that A separating element (170) movable in an axial direction (105) of the tool (100) is provided for forming a gap (410) between a plurality of first and second wire ends in a radial direction (104) of the tool (100).

4. The tool according to claim 3, characterized in that An actuating element (570) for moving the separating element (170) in an axial direction (105) of the tool (100) is associated with the separating element (170).

5. The tool according to claim 1 or 2, characterized in that A first and a second intermediate tool part (140, 150) are arranged between the first and the second tool part (130, 160) along the radial direction (104) of the tool (100), and the first and the second intermediate tool part each have a plurality of radial through holes (142, 152) along the peripheral direction (106) of the tool (100) for arranging the wire ends of a plurality of first and / or second wire ends, wherein the first and / or the second intermediate tool part (140, 150) each at least partially have the radially oriented loading tabs (155).

6. The tool according to claim 5, characterized in that The plurality of groove-shaped first receiving portions (132), the plurality of groove-shaped second receiving portions (162) and the plurality of radial through holes (142, 152) are respectively uniformly and evenly spaced apart from each other along the peripheral direction (106) of the tool (100) and are provided in the same number.

7. The tool according to claim 5, characterized in that An operating element (530, 560, 540, 550) is respectively assigned to the first and / or second tool part (130, 160) and the first and / or second intermediate tool part (140, 150) for rotating in a circumferential direction (106) of the tool (100).

8. The tool according to claim 5, characterized in that The first tool part (130) and the first intermediate tool part (140) as well as the second tool part (160) and the second intermediate tool part (150) can each be twisted synchronously with one another for crossing the wire ends.

9. A method for producing a winding (600) for an electric machine, the method comprising the following steps: a) Arranging the wire end at least partially in an associated groove-shaped receptacle (132, 162) of a tool (100) according to any one of claims 1 to 8, wherein A plurality of first thread elements (220) are located in a plurality of groove-shaped first receptacles (132) of a first tool part (130) of the tool (100), and / or a plurality of second thread ends are arranged in a plurality of groove-shaped second receptacles (162) of a second tool part (160) of the tool (100), b) pre-separating the wire ends by twisting at least a first or second tool part (130, 160) of the tool (100) for a first time in a peripheral direction (106) of the tool (100), wherein the first and second plurality of wire ends are spaced apart in a radial direction (104), c) separating the first and second plurality of wire ends by directionally moving a separating element (170) of the tool (100) for forming a gap (410) in an axial direction (105) of the tool (100), and d) Crossing the wire ends by twisting the first and / or second tool part (130, 160) of the tool (100) a second time in the peripheral direction (106) of the tool (100).

10. The method according to claim 9, characterized in that Loading tabs (155) are arranged on the first and / or second tool part (130, 160), which, during pre-separation, space the first and second wire ends apart in a radial direction (104) by loading the wire ends into the associated groove-shaped receptacles (132) and / or through-holes (142).

11. The method according to claim 9 or 10, characterized in that During separation, the separating element (170) penetrates into the tool (100) in the axial direction (105) of the tool (100) at least as far as the action web (155).

12. The method according to claim 9 or 10, characterized in that A further separation step is provided, wherein, after at least one of the twisted first and / or second tool parts (130, 160) has been rotated back into its initial position, the separation element (170) is immersed in the tool (100) in an axial direction (105) of the tool (100) beyond the load web (155) in order to enlarge the gap (410).

13. The method according to claim 9 or 10, characterized in that During the crossing, the first and second tool parts (130, 160) are twisted in opposite directions of rotation.

14. The method according to claim 9, characterized in that The gap (410) is an electrically separated plane (412).

15. An electric motor (300) having a winding (600) produced using the tool (100) according to any one of claims 1 to 8.

16. An electric machine (300) having a winding (600) produced using the method according to any one of claims 9 to 14.

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