Equipment for welding the twisted segmented stator coil

Abstract

A device for twisting the welding part of a segmented stator coil, comprising: a stator core having a plurality of narrow slots, into which segmented stator coils are inserted, the segmented stator coils being arranged in multiple layers and having welding parts; a frame; a plurality of twisting clamps, one twisting clamp being provided for each layer of stator coils, each twisting clamp being roughly annular and mounted on the frame along the radial direction of the stator core, and the twisting clamps being configured to rotate in different directions according to the layer of the stator coil, wherein a first coil receiving recess formed along the circumferential direction of a first twisting clamp faces a second coil receiving recess formed along the circumferential direction of an adjacent second twisting clamp; and a partition member being detachably provided at adjacent first and second twisting clamps, and the partition member being configured to separate the first coil receiving recess and the second coil receiving recess.

Description

[0001] Citations of Related Applications

[0002] This application claims the benefit of Korean Application No. 10-2020-0101492, filed on August 13, 2020, which is hereby incorporated by reference in its entirety. Technical Field

[0003] The disclosure of the present application relates to a system for manufacturing a hairpin winding type stator. Background Art

[0004] Generally, so-called environmentally friendly hybrid vehicles or electric vehicles use a technology that generates driving torque using a drive motor. To reduce the weight and volume of vehicles and components, automobile manufacturers and manufacturers of environmentally friendly parts use drive motors with stator windings having hairpin-type stator coils.

[0005] These hairpin winding type stators are manufactured through a process of inserting a hairpin type stator coil into a slot of a stator core and welding one end of the stator coil.

[0006] Meanwhile, as processes before welding welded portions of the stator coil inserted into slots of the stator core, processes for manufacturing the hairpin winding type stator include widening work of extending the distance between welded portions and twisting work of twisting the welded portions.

[0007] Here, the widening process ensures the insulation distance between the welded parts of the stator coil and also improves the workability (welding performance) in the welding process. The twisting process is to align the current movement paths of the welded parts.

[0008] In the twisting process, welded portions of the stator coil are twisted using a twisting jig provided for inserting each layer of the stator coil into the slots of the stator core.

[0009] Therefore, conventionally, the welded portion of the stator coil is inserted into a twisting jig for each layer of the stator coil, and the twisting jig is rotated in a different direction for each layer of the stator coil so that the welded portion of the stator coil can be twisted.

[0010] However, conventionally, a groove portion to which the welding portion of the stator coil is fitted is formed in the twist jig. Since the width of the twist jig is narrow, the groove portion forms a relatively thin groove wall.

[0011] Therefore, when twisting the welded portion of the stator coil using a conventional twisting jig, there is a high risk of damaging the groove wall of the groove portion, and the twisting quality of the welded portion may be deteriorated due to the damage to the groove wall.

[0012] Furthermore, conventionally, when the groove wall is damaged, the entire twist jig has to be replaced, which is disadvantageous in terms of maintenance of the twist jig and may increase costs due to replacement of the twist jig.

[0013] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person skilled in the art. Summary of the Invention

[0014] The disclosure of the present application relates to a system for manufacturing a hairpin winding type stator and a specific embodiment relates to a segmented stator coil twisting device for twisting a welded portion of the segmented stator coil inserted into a stator core.

[0015] Embodiments of the present invention provide an apparatus for twisting a weld of a segmented stator coil, which has the following advantages: a jig for twisting the weld is easy to maintain, while a groove structure for separating layers of the stator coil can also be maintained.

[0016] According to an exemplary embodiment, the device is a welding part for twisting a segmented stator coil, wherein the welding part is located in a plurality of layers and is inserted into a narrow slot of a stator core, and the device may include: i) a frame; ii) a plurality of twist clamps, each twist clamp provided for each layer of stator coil along the radial direction of the stator core, facing another twist clamp forming a pair therewith to form a coil receiving recess along the circumferential direction, and these twist clamps are mounted on the frame so as to be rotatable in different directions according to the layers of the stator coil and are generally annular; and iii) a partition member, detachably provided at one of a pair of adjacent twist clamps, and blocking the coil receiving recesses of the twist clamps forming a pair facing each other.

[0017] In addition, the apparatus for twisting welded portions of a segmented stator coil according to an exemplary embodiment may further include a driving unit mounted on the frame and configured to rotate the plurality of twisting jigs in different directions for odd and even layers of the stator coil.

[0018] In addition, according to the exemplary embodiment of the device for twisting the welding part of the segmented stator coil, the driving unit may include a plurality of driving gear components and a plurality of servo motors, the plurality of driving gear components are arranged on the frame in the up and down directions and are respectively connected to the plurality of twisting clamps, and the plurality of servo motors are respectively connected to the plurality of driving gear components.

[0019] In addition, according to an exemplary embodiment of an apparatus for twisting a welding portion of a segmented stator coil, the separating member may include a bolt joint portion and a separating wall, the bolt joint portion being horizontally arranged on the upper surface of the torsion clamp, between the coil receiving recesses and bolted to the upper surface of the torsion clamp, the separating wall being arranged between the bolt joint portions and integrally connected to the bolt joint portions, and the separating wall being vertically arranged between the coil receiving recesses of the torsion clamp facing each other.

[0020] In addition, an apparatus according to an exemplary embodiment is for twisting a welding portion of a segmented stator coil, wherein the welding portion is located in a plurality of layers and is inserted into a narrow slot of a stator core, and the apparatus may include: i) a frame; ii) a core clamp mounted on an upper side of the frame so as to be movable in an up-down direction and clamp an inner circumference of the stator core; iii) a crown fixing jig mounted on the core clamp and configured to fix the crown at the upper side of the stator coil; iv) a welding portion fixing jig mounted on the frame and configured to fix the welding portion of the stator coil; v) a plurality of twisting jigs, each twisting jig provided for each layer of the stator coil along a radial direction of the stator core, facing another twisting jig forming a pair therewith to form a coil receiving recess along a circumferential direction, the twisting jigs being mounted on the frame so as to be rotatable in different directions according to the layers of the stator coil and being substantially annular; and vi) a partition member detachably provided at one of a pair of adjacent twisting jigs, and blocking the coil receiving recesses of the twisting jigs forming a pair facing each other.

[0021] Furthermore, according to the apparatus for twisting the welded portion of the segmented stator coil of the exemplary embodiment, the crown fixing jig may include a first fixing member provided on the core holder to be radially movable back and forth and inserted between the crowns.

[0022] Furthermore, according to the apparatus for twisting welds of a segmented stator coil of the exemplary embodiment, the weld fixing jig may include a second fixing member provided on the frame to be radially movable back and forth and inserted between welds of the stator coil.

[0023] In addition, the apparatus for twisting welded portions of a segmented stator coil according to an exemplary embodiment may further include a driving unit mounted on the frame and configured to rotate the plurality of twisting jigs in different directions for odd and even layers of the stator coil.

[0024] In addition, according to the apparatus for twisting the welded portion of a segmented stator coil of an exemplary embodiment, the driving unit may include a plurality of driving gear components and a plurality of servo motors, which are arranged on a frame in an up-down direction and are respectively connected to a plurality of twisting clamps, and the servo motors are respectively connected to the plurality of driving gear components.

[0025] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, the partition member may be provided in a substantially ring shape and be bolt-engaged with the upper surface of the twisting jig.

[0026] In addition, according to the exemplary embodiment of the device for twisting the welding part of the segmented stator coil, the separation member may include a bolt joint and a separation wall, the bolt joint is horizontally arranged on the upper surface of the torsion clamp, between the coil receiving recesses, and is bolted to the upper surface of the torsion clamp, the separation wall is arranged between the bolt joints and is integrally connected to the bolt joints, and the separation wall is vertically arranged between the coil receiving recesses of the torsion clamp facing each other.

[0027] Furthermore, according to the apparatus for twisting a welded portion of a segment type stator coil of the exemplary embodiment, the partition member may include a plurality of cell partitions bolt-engaged with an upper surface of the twist jig along a circumferential direction of the twist jig.

[0028] In addition, according to an exemplary embodiment of an apparatus for welding a twisted segmented stator coil, the unit separator may include a pair of bolt joints and a partition wall, the pair of bolt joints being horizontally arranged on the upper surface of the twist clamp, between the coil receiving recesses and being bolted to the upper surface of the twist clamp, the partition wall being arranged between the pair of bolt joints and being integrally connected to the pair of bolt joints, and the partition wall being vertically arranged between the coil receiving recesses of the twist clamp facing each other.

[0029] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, the bolt coupling holes may be formed in the pair of bolt coupling portions.

[0030] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, a bolt coupling recess connected to the bolt coupling hole may be formed on the upper surface of the twisting jig.

[0031] Furthermore, according to the apparatus for twisting a weld portion of a segment type stator coil of the exemplary embodiment, the partition member may include a plurality of cell partitions disposed along a circumferential direction of the twist jig and inserted from an upper surface toward a lower surface of the twist jig.

[0032] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, the cell separator may be provided in a plate type in which a central portion is bent in a thickness direction of the twisting jig.

[0033] In addition, according to an exemplary embodiment of an apparatus for twisting the welding portion of a segmented stator coil, the unit separator may include a pair of insertion portions and a partition wall, the pair of insertion portions being arranged at both sides of the central portion and inserted into the twisting clamp in the up and down directions so as to be inserted between the coil receiving recesses, the partition wall being a central portion arranged between the pair of insertion portions and integrally connected to the pair of insertion portions, and the partition wall being vertically arranged between the coil receiving recesses of the twisting clamp facing each other.

[0034] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, the insertion portion may be connected to both sides of the partition wall in the circumferential direction of the twist jig and may be bent in the thickness direction of the twist jig.

[0035] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, the partition wall may be provided in the form of an open end.

[0036] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil according to the exemplary embodiment, an insertion slit into which the insertion portion may be inserted is formed downward from the upper surface of the twisting jig.

[0037] Furthermore, according to the apparatus for twisting the welded portion of the segment type stator coil of the exemplary embodiment, adjacent insertion portions of the cell partition may be fixed by a washer.

[0038] Furthermore, according to the apparatus for twisting a welded portion of a segment type stator coil of the exemplary embodiment, a washer may be bolt-engaged with an upper surface of the twisting jig.

[0039] According to exemplary embodiments, a separate partition member is employed to partition the coil receiving recesses between the twist jigs, thereby ensuring the strength of the twist jigs, improving the torsion quality of the welded portion, and minimizing the risk of damage to the twist jigs.

[0040] Other effects that can be obtained or predicted by the exemplary embodiments will be described explicitly or implicitly in the detailed description of the present invention. That is, various effects predicted according to the exemplary embodiments will be described in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The accompanying drawings are intended to be used as a reference for describing exemplary embodiments of the present invention, and the accompanying drawings should not be interpreted as limiting the technical spirit of the present invention.

[0042] Figure 1 is a view schematically illustrating an apparatus for twisting a welded portion of a segment type stator coil according to an exemplary embodiment.

[0043] Figure 2A crown fixing jig applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment is shown.

[0044] Figure 3 A weld portion fixing jig applied to an apparatus for twisting a weld portion of a segmented stator coil according to an exemplary embodiment is shown.

[0045] Figure 4 is a combined perspective view illustrating the structure of a twisting jig and a partition member applied to an apparatus for twisting a welded portion of a segment type stator coil according to an exemplary embodiment.

[0046] Figure 5 is an enlarged partial perspective view illustrating a combined structure of a twisting jig and a partition member applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment.

[0047] Figure 6 A driving unit applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment is schematically illustrated.

[0048] Figure 7 and Figure 8 Exemplary variations of a partition member applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment are shown.

[0049] Figure 9 and Figure 10 Other exemplary variations of the partition member applied to the apparatus for twisting the welded portion of the segmented stator coil according to the exemplary embodiment are shown.

[0050] Label Description:

[0051] 1: Stator

[0052] 3: stator core

[0053] 7: Stator coil

[0054] 8: Crown

[0055] 9: Welding Department

[0056] 10: Framework

[0057] 20: Core holder

[0058] 30: Crown fixing fixture

[0059] 30a, 40a: drive motor

[0060] 30b, 40b: drive gear

[0061] 31: First fixed track plate

[0062] 33, 43: guide track

[0063] 34: First fixing member

[0064] 35, 45: Cam follower protrusion

[0065] 37: First moving track plate

[0066] 39, 49: Cam follower tracks

[0067] 40: Welding fixture

[0068] 41: Second fixed track plate

[0069] 44: Second fixing member

[0070] 47: Second moving track plate

[0071] 50: Torsion fixture

[0072] 51: Coil receiving recess

[0073] 60: Drive unit

[0074] 61: Driving gear component

[0075] 63: Servo motor

[0076] 70, 170, 270: Separating components

[0077] 71, 171: Bolted joint

[0078] 73, 173, 273: partition wall

[0079] 75, 175: Bolt connection holes

[0080] 77, 177, 277: Bolt joint recess

[0081] 81: Bolt

[0082] 100: Torsion equipment

[0083] 170a, 270a: Cell separators

[0084] 271: Insertion

[0085] 274: Insert into the slit

[0086] 276: Washer DETAILED DESCRIPTION

[0087] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown. Those skilled in the art will appreciate that the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0088] In order to make the embodiments of the present invention clear, parts not related to the present description will be omitted, and the same elements or equivalents are denoted by the same reference numerals throughout the specification.

[0089] Furthermore, the size and thickness of each element are arbitrarily shown in the drawings, but the present invention is not necessarily limited thereto, and the thickness of layers, films, panels, regions, etc. may be exaggerated in the drawings for clarity.

[0090] Furthermore, in the following description, the names of components are divided into first, second, etc. to distinguish the names because the names of these components are the same as each other, and the order of these components is not limited thereto.

[0091] In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0092] In addition, each of terms such as “unit,” “device,” “part,” and “member” described in the specification means a unit of a comprehensive element that performs at least one function or operation.

[0093] Figure 1 is a view schematically illustrating an apparatus for twisting a welded portion of a segment type stator coil according to an exemplary embodiment.

[0094] refer to Figure 1 First, the hairpin winding stator 1 applied to the exemplary embodiment can be applied to a drive motor for a hybrid vehicle and / or electric vehicle, which are environmentally friendly vehicles and obtain drive torque using electrical energy. The drive motor includes the stator 1 applied to the exemplary embodiment and a rotor (not shown) provided with a certain air gap relative to the stator 1.

[0095] In the above, the stator 1 includes a stator core 3 in which a plurality of electrical steel sheets are stacked. The stator core 3 has a hairpin-type stator coil 7 (commonly referred to in the industry as a conductor, segment coil, or flat coil) wound through a plurality of slots.

[0096] In the above, the hairpin stator coil 7 is provided in a hairpin shape having a pair of legs in a U-shape or a V-shape, for example, and may be provided as a flat coil having a square cross section.

[0097] This hairpin type stator coil 7 is inserted into the slot of the stator core 3, and a pair of legs are extended through the lower end of the slot. In addition, the legs of the stator coil 7 can be welded to form an electrical connection circuit.

[0098] In the above description, the exemplary embodiment is described as a hairpin winding stator applied to a drive motor used in an environmentally friendly vehicle, but the scope of the present invention is not necessarily limited thereto. It is understood that the technical concept of the present invention can be applied to drive motors having hairpin stators of various types and uses.

[0099] Meanwhile, in a process of assembling a driving motor, the apparatus 100 for twisting a welded portion of a segment type stator coil according to an exemplary embodiment may be applied to a process of assembling a hairpin winding type stator 1 .

[0100] In addition, the apparatus 100 for twisting the welded portion of the segmented stator coil according to the exemplary embodiment can be applied to twist the welded portion 9 after widening processing to expand the interval between the welded portions 9 of the stator coil 7 protruding from the lower end of the stator core 3 before inserting the hairpin-type stator coil 7 into the slot of the stator core 3. The reason for twisting the welded portion 9 of the stator coil 7 is to align the current movement paths of the welded portion 9.

[0101] Here, the upper end of the stator coil 7 protruding from the upper end of the stator core 3 may be defined as a crown 8. In addition, a welding portion 9 protruding from the lower end of the stator core 3 is radially arranged through a slot along a radial direction of the stator core 3.

[0102] Furthermore, the stator coil 7 circumferentially arranged at the radially outermost side is called the first layer, and the layers located inside the first layer in the radial direction of the stator core 3 are called the second, third, fourth, fifth, sixth, and so on.

[0103] In the following, with reference to the installation position of the constituent elements in the accompanying drawings, in terms of part, the part set upward is referred to as the upper part, the upper end, the upper surface and the upper end part, and in terms of part, the part set downward is referred to as the lower part, the lower end, the lower surface and the lower end part.

[0104] The apparatus 100 for twisting the weld portion of a segmented stator coil according to an exemplary embodiment is configured so that easy maintenance of the jig for twisting the weld portion 9 can be achieved with respect to insertion of the weld portion 9 of the stator coil 7 while maintaining the groove structure for separating the layers of the stator coil 7 .

[0105] To this end, an apparatus 100 for twisting a weld of a segment type stator coil according to an exemplary embodiment includes a frame 10 , a core holder 20 , a crown fixing jig 30 , a weld fixing jig 40 , a twisting jig 50 , a driving unit 60 , and a separation member 70 .

[0106] In the above, the frame 10 is used to install various components (which will be further described below) and is installed at the bottom of the processing work area. The frame 10 can be formed as a single frame or two or more frames connected to each other.

[0107] Furthermore, the frame 10 may include various auxiliary elements for supporting the various constituent elements, such as brackets, bars, rods, plates, blocks, ribs, collars, and the like.

[0108] However, since the auxiliary members are used to mount constituent elements, which will be further described below, in the frame 10 , the auxiliary members are collectively referred to as the frame 10 unless otherwise specified.

[0109] In the exemplary embodiment, the core clamp 20 is mounted on the upper side of the frame 10 so as to be movable in the vertical direction. The core clamp 20 includes a finger-shaped clamping device that clamps the inner periphery of the stator core 3 by operation of an actuator, and a lifting device for reciprocating the clamping device in the vertical direction.

[0110] Since such a core holder 20 may be constructed as is known in the art, its construction will not be described in further detail.

[0111] In the exemplary embodiment, the crown fixing jig 30 is used to fix the crown 8 at the upper side of the stator coil 7. The crown fixing jig 30 is mounted on the core holder 20.

[0112] like Figure 2 As shown, the crown fixing fixture 30 is arranged to be movable radially back and forth on the edge of the core holder 20 and to be inserted between the crowns 8 of the stator coils 7 .

[0113] The crown fixing jig 30 includes a first fixing rail plate 31 which is disc-shaped and fixedly mounted on the edge side of the core holder 20 , and a plurality of first fixing members 34 mounted on the first fixing rail plate 31 to be radially movable back and forth.

[0114] A guide rail 33 is radially formed on an upper surface of the first fixed rail plate 31 , and a first fixing member 34 is slidably coupled to the guide rail 33 of the first fixed rail plate 31 . Here, the first fixing member 34 includes a cam follower protrusion 35 .

[0115] Furthermore, the crown fixing jig 30 includes a disc-shaped first moving rail plate 37 as a driving device for moving the first fixing member 34 back and forth and rotatably mounted on the edge side of the core holder 20 through a driving motor 30a and a driving gear 30b.

[0116] The first moving rail plate 37 supports the cam follower protrusion 35 of the first fixing member 34 and forms a cam follower rail 39 that comes into cam contact with the cam follower protrusion 35 .

[0117] Here, the cam follower track 39 is formed as a track recess whose cross section is curved into a circle toward the center of the first moving track plate 37. The cam follower protrusion 35 of the first fixing member 34 slides into the cam follower track 39. The cam follower protrusion 35 of the first fixing member 34 is slidably coupled to the cam follower track 39.

[0118] refer to Figure 1 In the exemplary embodiment, the welding portion fixing jig 40 is used to fix the welding portion 9 of the stator coil 7 . The welding portion fixing jig 40 is mounted on the frame 10 .

[0119] like Figure 3 As shown, the welding portion fixing jig 40 is provided on the frame 10 to be movable radially back and forth, and can be inserted between the welding portions 9 of the stator coil 7 .

[0120] The welding portion fixing jig 40 includes a second fixing rail plate 41 that is disc-shaped and fixedly mounted on the frame 10 , and a plurality of second fixing members 44 mounted on the second fixing rail plate 41 so as to be radially movable back and forth.

[0121] A guide rail 43 is radially formed on an upper surface of the second fixed rail plate 41 , and a second fixing member 44 is slidably coupled to the guide rail 43 of the second fixed rail plate 41 . Here, the second fixing member 44 includes a cam follower protrusion 45 .

[0122] Furthermore, the welding portion fixing jig 40 includes a disc-shaped second moving rail plate 47 as a driving device for moving the second fixing member 44 back and forth and rotatably mounted on the frame 10 through a driving motor 40 a and a driving gear 40 b .

[0123] The second moving rail plate 47 supports the cam follower protrusion 45 of the second fixing member 44 and forms a cam follower rail 49 that comes into cam contact with the cam follower protrusion 45 .

[0124] Here, the cam follower rail 49 is formed as a rail recess whose cross section is curved into a circle toward the center of the second moving rail plate 47. The cam follower protrusion 45 of the second fixing member 44 is slidably coupled to the cam follower rail 49.

[0125] refer to Figure 1In the exemplary embodiment, the twisting jig 50 twists the welded portion 9 of the stator coil 7 as a whole, and the twisting jig is provided in a ring shape and is rotatably installed in the frame 10 .

[0126] Figure 4 is a combined perspective view illustrating the structure of a twisting jig and a partition member applied to an apparatus for twisting a welded portion of a segment type stator coil according to an exemplary embodiment. Figure 5 is an enlarged partial perspective view illustrating a combined structure of a twisting jig and a partition member applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment.

[0127] refer to Figure 4 and Figure 5 , the twisting jig 50 according to the exemplary embodiment is provided along the radial direction of the stator core 3 for each layer of the stator coil 7 .

[0128] Here, the number of twist jigs 50 is set to correspond to the number of layers of stator coil 7, and each twist jig 50 is formed into a ring shape. For example, the twist jig 50 corresponding to the first layer of stator coil 7 is arranged on the outermost side, and the twist jigs 50 corresponding to the second, third, fourth, fifth, and sixth layers are sequentially arranged inside the outermost twist jig 50. Although only two twist jigs 50 corresponding to the first and second layers of stator coil 7 facing each other are shown in the drawings for ease of explanation, this can be easily understood.

[0129] The twisting jig 50 is rotatably mounted on the frame 10 and can be rotated in a different direction for each layer of the stator coil 7. That is, the twisting jig 50 for the stator coil 7 of the odd-numbered layers and the twisting jig 50 for the stator coil 7 of the even-numbered layers can be rotated in a different direction.

[0130] Each twist jig 50 has a plurality of coil-receiving recesses 51 formed along the circumferential direction, with these coil-receiving recesses facing the other twist jig 50 forming a pair of twist jigs. That is, if the first twist jig 50 has coil-receiving recesses 51 formed toward the second twist jig 50, then the second twist jig 50 has coil-receiving recesses 51 formed toward the first twist jig 50. The coil-receiving recesses 51 are portions into which the welded portions 9 of the stator coil 7 are inserted, and are formed in the upper and lower directions on the outer circumferential surface of the twist jig 50.

[0131] As described above, the coil receiving recesses 51 are formed on adjacent surfaces facing each other of the pair of twist jigs 50. That is, the coil receiving recesses 51 are formed on the inner periphery of one twist jig 50 and on the outer periphery of the other twist jig 50. The coil receiving recesses 51 formed on the pair of twist jigs 50 can be combined facing each other to form a channel or groove.

[0132] refer to Figure 1 In an exemplary embodiment, the driving unit 60 is used to rotate the twisting jig 50 for the stator coils 7 of the odd-numbered layers and the twisting jig 50 for the stator coils 7 of the even-numbered layers in different directions.

[0133] The driving unit 60 is mounted on the frame 10 to be connected to the torsion jig 50. Figure 6 As shown, such a driving unit 60 includes a driving gear member 61 and a servo motor 63 .

[0134] The drive gear members 61 are provided on the frame 10 in the vertical direction and are respectively connected to the twist jigs 50. The servo motors 63 are motors capable of servo-controlling the rotation direction and rotation speed and are respectively connected to the drive gear members 61. The servo motors 63 can be gear-engaged with the drive gear members 61 via a drive shaft.

[0135] refer to Figure 4 and Figure 5 In an exemplary embodiment, a partition member 70 may block the coil receiving recesses 51 of a pair of twist jigs 50 facing each other, and the partition member may be detachably provided at one of the pair of adjacent twist jigs 50. The partition member 70 is provided in a generally annular shape and may be engaged on the upper surface of the twist jig 50 by a bolt 81.

[0136] The partition member 70 is generally annular and integrally forms a bolt joint 71 and a partition wall 73. The bolt joint 71 is provided horizontally on the upper surface of the twist jig 50 between the coil receiving recesses 51 and is joined to the upper surface of the twist jig 50 by bolts 81.

[0137] Here, bolt engaging holes 75 are respectively formed in the bolt engaging portions 71. Furthermore, bolt engaging recesses 77 connected to the bolt engaging holes 75 are formed in the upper surface of the twist jig 50.

[0138] Therefore, while the bolts 81 are engaged to the bolt engagement recesses 77 through the bolt engagement holes 75 , the partition member 70 may be fixedly coupled to the upper surface of the twist jig 50 .

[0139] Furthermore, the partition wall 73 provided between the bolt joints 71 is integrally connected to the bolt joints 71 and provided between the coil receiving recesses 51 of the twist jig 50 facing each other in the vertical direction (vertical direction of the bolt joints 71 ).

[0140] In the above, the partition wall 73 is provided between the two twist jigs 50 forming a pair of twist jigs, and can divide the coil receiving recesses 51 of the pair of twist jigs 50 that have been combined to form a channel or groove into two channels or grooves.

[0141] Hereinafter, operations of the apparatus 100 for twisting a welded portion of a segment type stator coil according to an exemplary embodiment are described in detail with reference to the accompanying drawings.

[0142] First, in the exemplary embodiment, the hairpin type stator coil 7 is inserted into the slot of the stator core 3. Here, the stator coil 7 is inserted into the slot of the stator core 3 in the radial direction, and the welding portion 9 at the insertion end protrudes through the slot.

[0143] In this state, in the exemplary embodiment, the inner periphery of the stator core 3 is clamped by the core clamp 20. At this time, the first fixing member 34 of the crown fixing jig 30 moves rearward along the guide rail 33 on the first fixed rail plate 31. In addition, the cam follower protrusion 35 of the first fixing member 34 is supported by the cam follower rail 39 of the first moving rail plate 37.

[0144] Then, in the exemplary embodiment, when the first moving rail plate 37 rotates in one direction, the rotational motion of the first moving rail plate 37 is converted into the linear motion of the first fixing member 34 by the cam operation of the cam follower rail 39 and the cam follower protrusion 35 .

[0145] Therefore, in the exemplary embodiment, the first fixing member 34 is moved forward by the guide rail 33 on the first fixing rail plate 31 , and the first fixing member 34 is inserted between the crowns 8 of the stator coil 7 , thereby fixing the crowns 8 .

[0146] In this state, in the exemplary embodiment, the stator core 3 is moved downward by the core clamper 20 , and the welding portions 9 of the stator coil 7 are inserted into the coil receiving recesses 51 of the twist jig 50 for each layer of the stator coil 7 .

[0147] Here, the partition member 70 is engaged with one of the pair of torsion jigs 50 by a bolt 81 passing through the bolt engaging portion 71. In addition, the partition wall 73 of the partition member 70 is vertically provided between the coil receiving recesses 51 of the pair of torsion jigs 50 facing each other, and divides the coil receiving recesses 51 that have been combined to form one channel or groove into two channels or grooves.

[0148] Therefore, for each layer of the stator coil 7 , the welded portions 9 of the stator coil 7 are respectively inserted into the coil receiving recesses 51 of the twist jig 50 , in which the partition walls 73 of the partition member 70 are interposed.

[0149] Furthermore, the second fixing member 44 of the welding portion fixing jig 40 moves rearward along the guide rail 43 on the second fixing rail plate 41 . Furthermore, the cam follower protrusion 45 of the second fixing member 44 is supported by the cam follower rail 49 of the second moving rail plate 47 .

[0150] In the exemplary embodiment, when the welding portions 9 of the stator coils 7 are respectively inserted into the coil receiving recesses 51 of the twist jig 50, the second movable rail plate 47 rotates. Then, in the exemplary embodiment, the rotational motion of the second movable rail plate 47 is converted into the linear motion of the second fixed member 44 by the cam operation of the cam follower rail 49 and the cam follower protrusion 45.

[0151] Therefore, in the exemplary embodiment, the second fixing member 44 is moved forward by the guide rail 43 on the second fixing rail plate 41 , and the second fixing member 44 is inserted between the welding portions 9 of the stator coil 7 , thereby fixing the welding portions 9 .

[0152] Then, in the exemplary embodiment, the twisting jig 50 rotates the odd-numbered layers and the even-numbered layers of the stator coil 7 in different directions through the driving unit 60 .

[0153] Therefore, in an exemplary embodiment, when the welding portion 9 of the stator coil 7 is inserted into the coil receiving recess 51 of the torsion clamp 50, the torsion clamp 50 rotates in different directions for each layer of the stator coil 7, so that the welding portion 9 can be twisted while being supported by the inner surface of the coil receiving recess 51 and the partition wall 73 of the partition member 70.

[0154] Meanwhile, in the exemplary embodiment, in the process of twisting and forming the welded portion 9 of the stator coil 7 , damage of the partition member 70 may occur through a series of processes and reverse processes as described above.

[0155] In this case, in an exemplary embodiment, the damaged partition member 70 may be separated from the twist jig 50 by loosening the bolt 81 , and a new partition member 70 may be mounted on the twist jig 50 .

[0156] According to the apparatus 100 for twisting the welded portion of a segmented stator coil according to an exemplary embodiment as described above, the coil receiving recess 51 of the twisting clamp 50 is designed as an open structure, so that the groove wall in the conventional field is removed, and a separate partitioning member 70 is used instead to separate the coil receiving recess 51 between the twisting clamps 50, thereby ensuring the strength of the twisting clamp 50.

[0157] Therefore, in the exemplary embodiment, by applying the separation member 70 alone, the torsional quality of the welded portion 9 can be improved, and the risk of damage to the torsional jig 50 can be minimized.

[0158] Furthermore, in the exemplary embodiment, when the partition member 70 is damaged, only the partition member 70 can be replaced without replacing the entire twist jig 50. Therefore, the cost of replacing the entire twist jig 50 can be reduced and maintenance of the twist jig 50 becomes easier, thereby improving the maintainability of the twist jig 50.

[0159] Figure 7 and Figure 8 Exemplary variations of a partition member applied to an apparatus for twisting a welded portion of a segmented stator coil according to an exemplary embodiment are shown.

[0160] refer to Figure 7 and Figure 8 The partition member 170 according to the present exemplary modification may include a plurality of cell partitions 170a that are engaged with the upper surface of the twist jig 50 along the circumferential direction of the twist jig 50 by the bolts 81. That is, the partition member 170 of the present exemplary modification includes the cell partitions 170a as a plurality of workpieces.

[0161] This unit partition 170a is integrally formed with a pair of bolt engaging portions 171 and a single partition wall 173. The pair of bolt engaging portions 171 are horizontally provided on the upper surface of the twist jig 50 between the coil receiving recesses 51 of the twist jig 50 and are engaged with the upper surface of the twist jig 50 by the bolts 81.

[0162] Here, bolt engaging holes 175 are respectively formed on the pair of bolt engaging portions 171. In addition, bolt engaging recesses 177 correspondingly connected to the bolt engaging holes 175 are formed on the upper surface of the twist jig 50.

[0163] Therefore, the cell partition 170 a may be fixedly coupled to the upper surface of the twist jig 50 along the circumferential direction by the bolts 81 engaged with the bolt engaging recesses 177 through the bolt engaging holes 175 .

[0164] Furthermore, the partition wall 173 is provided between the pair of bolt joints 171 and is integrally connected to the bolt joints 171. Furthermore, the partition wall 173 is provided vertically between the coil receiving recesses 51 of the twist jig 50.

[0165] In the above, the partition wall 173 divides the coil receiving recesses 51 of the pair of twist jigs 50 , which have been combined to form one channel or groove, into two channels or grooves.

[0166] Therefore, in an exemplary embodiment, since the unit partition 170a is in the form of multiple workpieces, which constitute the partition member 170 connected to the torsion clamp 50 by bolts 81, when the partition member 170 is damaged, only the unit partition 170a corresponding to the damaged area can be replaced, so that the torsion clamp 50 can be maintained more easily.

[0167] Figure 9 and Figure 10 Other exemplary variations of the partition member applied to the apparatus for twisting the welded portion of the segmented stator coil according to the exemplary embodiment are shown.

[0168] refer to Figure 9 and Figure 10 The partition member 270 according to the exemplary embodiment may include a plurality of cell partitions 270a that are arranged along the circumferential direction of the twist jig 50 and inserted from the upper surface toward the lower surface of the twist jig 50. That is, the partition member 270 of the present exemplary modification includes the cell partitions 270a as a plurality of workpieces.

[0169] In the present exemplary modification, the cell partitions 270a are provided in a plate shape whose central portion is bent in the thickness direction of the twist jig 50. Each of such cell partitions 270a integrally forms a pair of insertion portions 271 and a partition wall 273.

[0170] A pair of insertion portions 271 are provided on both sides of the central portion of the unit partition 270a and are inserted into the twist jig 50 from both sides of the coil receiving recesses 51 of the twist jig 50 in the up and down directions, thereby being interposed between the coil receiving recesses 51 of the twist jig 50.

[0171] The partition wall 273 is a central portion provided between the pair of insertion portions 271 and integrally connected thereto, and is vertically provided between the coil receiving recesses 51 of the twist jig 50 facing each other.

[0172] Here, a pair of insertion portions 271 are connected to both sides of the partition wall 273 in the circumferential direction of the twist jig 50 and bent in the thickness direction of the twist jig 50. That is, the partition wall 273 is provided in an open-end form, for example, a C-shape.

[0173] In addition, an insertion slit 274 into which the insertion portion 271 can be inserted is formed downward from the upper surface of the twist jig 50 interposed between the coil receiving recesses 51. With the partition wall 273 disposed inside the coil receiving recesses 51, the pair of insertion portions 271 are downwardly inserted into the insertion slit 274.

[0174] Furthermore, adjacent insertion portions 271 of cell partitions 270a are fixed by washers 276, and washers 276 are engaged with the upper surface of twist jig 50 via bolts 81. Furthermore, bolt engagement recesses 277 engaged with bolts 81 via washers 276 are formed in the upper surface of twist jig 50.

[0175] Therefore, the cell partition 270 a is downwardly inserted into the insertion slit 274 of the twist jig 50 through the insertion portion 271 , and the partition wall 273 of the cell partition 270 a is vertically disposed between the coil receiving recesses 51 of the twist jig 50 facing each other.

[0176] In this state, in the present exemplary modification, the washer 276 is provided above the adjacent insertion portion 271 on the upper surface of the twist jig 50, and the bolt 81 is engaged with the bolt engagement recess 277 of the upper surface of the twist jig 50 through the washer 276. Thus, the cell partition 270a can be fixedly coupled to the twist jig 50 in the circumferential direction.

[0177] Therefore, in the exemplary embodiment, the partition member 270 is configured such that the cell partitions 270a in the form of a plurality of workpieces are inserted into the twist jig 50, and the cell partitions 270a are engaged with the twist jig 50 through the washers 276 and the bolts 81. Therefore, in the event that the partition member 270 is damaged, only the cell partitions 270a corresponding to the damaged area can be replaced, thereby enabling easier maintenance of the twist jig 50.

[0178] While the invention has been described in connection with what are presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An apparatus for twisting a welded portion of a segmented stator coil, comprising: a stator core having a plurality of slots configured to receive multiple layers of segmented stator coils such that welds extend from a bottom surface of the stator core; frame; a plurality of twist jigs, one for each layer of the stator coil, each of the twist jigs being substantially annular and mounted on the frame along a radial direction of the stator core, and the plurality of twist jigs being configured to be rotatable in different directions depending on the layer of the stator coil, wherein a first coil receiving recess formed along a circumferential direction of a first twist jig faces a second coil receiving recess formed along a circumferential direction of an adjacent second twist jig; and a partition member detachably provided at the adjacent first torsion jig and the second torsion jig, the partition member being configured to separate the first coil receiving recess and the second coil receiving recess, Wherein, the partition member comprises: a bolt engaging portion horizontally provided on an upper surface of the first torsion jig between the first coil receiving recess and the second coil receiving recess, the bolt engaging portion being bolt-engaged with the upper surface of the first torsion jig; and A partition wall is provided between the bolt joints and is integrally connected to the bolt joints, and the partition wall is vertically provided between the first coil receiving recess and the second coil receiving recess. 2 . The apparatus of claim 1 , further comprising a driving unit mounted on the frame and configured to rotate the plurality of twisting jigs in different directions for odd-numbered layers and even-numbered layers of the stator coil.

3. The device according to claim 2, wherein The driving unit includes: a plurality of driving gear members provided on the frame in an up-down direction and connected to the plurality of twist jigs, respectively; and A plurality of servo motors are respectively connected to the plurality of driving gear members.

4. An apparatus for twisting a welded portion of a segmented stator coil, comprising: a stator core having a plurality of slots configured to receive multiple layers of segmented stator coils such that welds extend from a bottom surface of the stator core; frame; a core clamper mounted on an upper side of the frame and configured to be movable in an up-down direction and to clamp an inner periphery of the stator core; a crown fixing fixture mounted on the core holder and configured to fix a crown at an upper side of the stator coil; a welding portion fixing jig mounted on the frame and configured to fix the welding portion at a lower side of the stator coil; a plurality of twist jigs, one twist jig being provided for each layer of the stator coil, wherein each twist jig is substantially annular and is mounted on the frame along a radial direction of the stator core, and the plurality of twist jigs are configured to be rotatable in different directions depending on the layer of the stator coil, wherein a first coil receiving recess formed along a circumferential direction of a first twist jig faces a second coil receiving recess formed along the circumferential direction of an adjacent second twist jig; and a partition member detachably provided at the adjacent first torsion jig and the second torsion jig, the partition member being configured to separate the first coil receiving recess and the second coil receiving recess, Wherein, the partition member comprises: a bolt engaging portion horizontally provided on an upper surface of the first torsion jig between the first coil receiving recess and the second coil receiving recess, the bolt engaging portion being bolt-engaged with the upper surface of the first torsion jig; and A partition wall is provided between the bolt joints and is integrally connected to the bolt joints, and the partition wall is vertically provided between the first coil receiving recess and the second coil receiving recess.

5. The device according to claim 4, wherein The crown fixing jig includes a first fixing member provided on the core holder, and the first fixing member is configured to be radially movable back and forth and inserted between the crowns of the stator coils.

6. The apparatus according to claim 4, wherein The welding portion fixing jig includes a second fixing member provided on the frame, and the second fixing member is configured to be radially movable back and forth and inserted between the welding portions of the stator coil.

7. The apparatus according to claim 4, further comprising a driving unit mounted on the frame, and the driving unit is configured to rotate the plurality of twisting jigs in different directions for odd-numbered layers and even-numbered layers of the stator coil, wherein The driving unit includes: a plurality of driving gear members provided on the frame in an up-down direction and connected to the plurality of twist jigs, respectively; and A plurality of servo motors are respectively connected to the plurality of driving gear members.

8. The apparatus according to claim 4, wherein The partition member is provided in a substantially annular shape and is bolt-engaged with an upper surface of the first torsion jig.

9. The apparatus according to claim 4, wherein The partition member includes a plurality of cell partitions that are bolt-engaged with an upper surface of the first twist jig along a circumferential direction of the first twist jig.

10. The apparatus according to claim 9, wherein Each unit divider includes: a pair of bolt engaging portions horizontally provided on an upper surface of the first torsion jig between the first coil receiving recess and the second coil receiving recess, the pair of bolt engaging portions being bolt-engaged with the upper surface of the first torsion jig; and A partition wall is provided between the pair of bolt joints and is integrally connected to the pair of bolt joints, and the partition wall is vertically provided between the first coil receiving recess and the second coil receiving recess.

11. The apparatus according to claim 10, wherein: bolt engaging holes are formed in the pair of bolt engaging portions; and A bolt engaging recess connected to the bolt engaging hole is formed on an upper surface of the first torsion jig.

12. The apparatus according to claim 4, wherein The partition member includes a plurality of cell partitions that are arranged along a circumferential direction of the first twist jig and inserted from an upper surface toward a lower surface of the first twist jig.

13. The apparatus according to claim 12, wherein Each of the cell partitions is provided in a plate shape, and a central area of ​​the plate-shaped cell partition is bent in a thickness direction of the first twist jig.

14. The apparatus according to claim 13, wherein Each of the cell separators comprises: a pair of insertion portions provided at both sides of the central region and inserted into the first twist jig in an up-down direction so as to be interposed between the first coil receiving recess and the second coil receiving recess; and A partition wall is provided at a central portion between the pair of insertion portions and is integrally connected to the pair of insertion portions, and is vertically provided between the first coil receiving recess and the second coil receiving recess.

15. The apparatus of claim 14, wherein: The pair of insertion portions are connected to both sides of the partition wall in the circumferential direction of the first twist jig and are bent in the thickness direction of the first twist jig; and The partition wall is provided in an open-ended form.

16. The apparatus according to claim 14, wherein An insertion slit is formed downward from an upper surface of the first twist jig, and the pair of insertion portions are inserted into the insertion slit.

17. The apparatus of claim 14, wherein: Adjacent insertion portions of the cell separators are fixed by gaskets; and The washer is bolted to an upper surface of the first torsion clamp.

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