Hairpin alignment device

Abstract

The present specification relates to arranging a horizontally expanding clamping device between the arrangement of hairpins, inserting an alignment pin into the clamping device to expand the clamping device horizontally, and aligning the hairpins horizontally by means of the expanded clamping device. Embodiments of a hairpin alignment device whereby the hairpin is aligned for each pair of welding objects without changing the height of the hairpin.

Description

Technical Field

[0001] Embodiments are directed to an apparatus for aligning hairpins of a stator prior to welding. Background Art

[0002] The structure of the automobile drive motor has a plurality of hairpin windings in the stator, so welding is required to electrically connect them. Such hairpin windings (hereinafter referred to as hairpins) are not aligned for welding, so alignment is required before welding. As a technology for aligning the hairpins before welding, there are a method of aligning each hairpin and a technology of aligning all windings at once. The technology of aligning the hairpins separately has a problem that a lot of alignment time is consumed, resulting in a decrease in productivity, and the method of aligning them all at once has a problem that the hairpins cannot be accurately aligned in pairs during alignment.

[0003] As a prior art regarding such a unified alignment method, prior art document 1 (Korea Patent Publication No. 10-2021-0058117) discloses a technique for aligning hairpins by rotating an alignment unit composed of partition protrusions, and prior art document 2 (Korea Patent Publication No. 10-2022-0060174) discloses a technique for aligning hairpins by rotating an alignment unit having an elliptical cross-section. Figure 1 As shown, the partition protrusion AU rises or falls according to the rotation direction, which may cause the height of the hairpin HP to be staggered. In the case of the prior art document 2, as shown in FIG. Figure 2 As shown, when the alignment unit AU of the elliptical cross-section rotates, the closely attached hairpin HP is pushed up or down, thereby causing the alignment in the vertical direction to be disrupted.

[0004] Thus, in the conventional alignment technology, the height of the hairpins is changed during the alignment process, resulting in a step between the hairpins, which makes welding difficult. In addition, due to the change in the height of the hairpins, it is difficult to provide a protection unit on the upper part of the hairpins to protect the hairpins during welding, so the hairpins can only be formed into a structure that cannot withstand welding.

[0005] That is, it is difficult to accurately align the hairpins vertically in the prior art, and welding is difficult due to the inaccuracy of such alignment and structural limitations. Summary of the invention

[0006] Technical issues

[0007] An object of the present invention is to improve the above-mentioned limitations of the prior art.

[0008] Thus, the present specification provides an embodiment that can accurately align the positions of the hairpins without changing their heights.

[0009] In addition, an embodiment is provided in which the hairpins are aligned in a manner that enables easy welding.

[0010] Furthermore, an embodiment is provided that can uniformly align the hairpins.

[0011] Meanwhile, an embodiment is provided that can align the hairpins with a simple structure.

[0012] Means for Solving the Problem

[0013] To solve the above-described problem, the solution of the present invention is to align the hairpins by a horizontal alignment method.

[0014] Specifically, it is characterized in that a horizontally expanding clamping device is disposed between the arrangements of the hairpins, and an alignment pin is inserted into the clamping device to horizontally expand the clamping device, so that the hairpins are horizontally aligned by the expanded clamping device.

[0015] Thus, the hairpins can be aligned for each pair of welding objects without changing the height of the hairpins.

[0016] The above technical features can be applied to a device for aligning hairpins, a device for assembling hairpins, and a shelving device for welding hairpins. This specification provides an embodiment of a hairpin alignment device having the above technical features.

[0017] To solve the above problem, an embodiment of a hairpin alignment device includes: a fixing part that fixes the stator by raising it to a specific position, the stator being formed by arranging a plurality of hairpins protruding upward along an arc in multiple rows and multiple columns; a clamping part that is disposed at positions corresponding to each of the multiple columns, and includes a plurality of clamping devices that are disposed between each of the multiple columns when the stator is raised to the specific position; and an alignment part that includes a plurality of alignment pins, and when the plurality of clamping devices are located between each of the multiple columns, the alignment pins are inserted into the insertion holes of each of the plurality of clamping devices to horizontally expand each of the plurality of clamping devices and press them against the hairpins arranged in the two side columns.

[0018] In the above stator, the plurality of hairpins may be arranged in an even number of rows.

[0019] The above specific position may be a position where the plurality of hairpins protrude by a predetermined length or more from the position where the plurality of clamping devices are disposed when the plurality of clamping devices are respectively disposed between each of the multiple columns.

[0020] Each of the plurality of clamping devices may have a front end disposed in the central direction of the stator and a rear end disposed in the circumferential direction of the stator.

[0021] The plurality of clamping devices may each be formed in a shape that becomes wider as it approaches the rear end from the front end.

[0022] In each of the plurality of clamping devices described above, it may be that: the above-mentioned insertion hole is formed at the rear end, and the above-mentioned alignment pin is inserted into the above-mentioned rear end and advances forward and expands horizontally to a degree corresponding to the width of the above-mentioned alignment pin.

[0023] Each of the plurality of clamping devices may be formed with a plurality of alignment teeth on both sides corresponding to the arrangement of the above-mentioned multiple rows.

[0024] The above-mentioned alignment teeth may be formed at regular intervals on both sides of the above-mentioned clamping device respectively in a number corresponding to the number of pairs of hairpins arranged in the above-mentioned multiple rows.

[0025] When the above-mentioned clamping device expands horizontally and adheres to the hairpins arranged in the two side columns, the above-mentioned alignment teeth may adhere the hairpins arranged in the above-mentioned multiple rows two by two.

[0026] Each of the plurality of clamping devices may include one or more O-rings, which expand when the above-mentioned alignment pin is inserted and contract when the above-mentioned alignment pin is ejected.

[0027] At least one of the above-mentioned O-rings may be provided at the end of the above-mentioned clamping device.

[0028] The above-mentioned alignment part may further include: a driving unit that moves the above-mentioned plurality of alignment pins to be inserted into the above-mentioned insertion hole or ejected from the above-mentioned insertion hole.

[0029] The above-mentioned plurality of alignment pins may be inserted into the above-mentioned insertion hole and advance at a specified speed.

[0030] The above-mentioned plurality of alignment pins may be simultaneously inserted into the insertion holes of each of the plurality of clamping devices.

[0031] The above-mentioned plurality of alignment pins may be inserted into the above-mentioned insertion hole and remain inserted for a specified period of time after the above-mentioned plurality of clamping devices expand horizontally.

[0032] The above-mentioned plurality of alignment pins may be formed to have a lateral width less than or equal to the sum of the intervals between the two sides of the above-mentioned clamping device and the hairpins in the two columns when the above-mentioned clamping device is disposed between the two columns.

[0033] The above-mentioned hairpin alignment device may further include: a cover portion that forms a plurality of protruding holes at positions corresponding to each arrangement of the above-mentioned multiple columns, and when the above-mentioned stator is at the above-mentioned specific position, the above-mentioned plurality of hairpins penetrate the above-mentioned plurality of protruding holes and protrude.

[0034] The above-mentioned cover portion may be in the form of a disc provided on the upper part of the above-mentioned plurality of clamping devices.

[0035] In the above-mentioned cover part, it is possible that the multiple hairpins penetrate the protruding holes and protrude from the protruding holes by a length of more than a specified length.

[0036] The protruding holes can be formed to have an area exceeding the area of one row of the hairpins and within 1.2 times the area.

[0037] Advantages of the Invention

[0038] According to the embodiment of the hairpin alignment device as described above, the clamping device expands horizontally to align the hairpins, so that the hairpins move up and down during the alignment process to prevent height changes.

[0039] Thus, the height alignment of the hairpins is not disrupted, and the positions of the hairpins can be accurately aligned for each pair of welding objects.

[0040] In addition, the clamping device expands horizontally to align the hairpins, so the hairpins can be aligned regardless of the clamping height.

[0041] Thus, clamping can also be achieved on the winding covering part of the hairpins, not only ensuring the welding object part of the hairpins sufficiently, but also ensuring the installation space for the welding protection cover.

[0042] By accurately aligning the positions of the hairpins for each pair of welding objects and ensuring the installation space for the welding object part and the welding protection cover, not only can welding be easily performed, but also accurate and stable welding can be achieved.

[0043] Furthermore, since accurate and stable welding can be achieved, the quality of the motor can be improved.

[0044] At the same time, the hairpins can be uniformly aligned, so the time consumed during alignment can be minimized, and thus productivity can be improved.

[0045] The effects of the embodiment of the above-mentioned hairpin alignment device are not limited to the above effects, and also include the effects described in the following specific description or analogized / derived from the specific description. Brief Description of the Drawings

[0046] Figure 1 It is an illustration showing a conventional hairpin alignment method Figure 1 .

[0047] Figure 2 It is an illustration showing a conventional hairpin alignment method Figure 2 .

[0048] Figure 3 It is a perspective view showing an example of a stator with multiple protruding hairpins.

[0049] Figure 4 It is Figure 3Top view of the stator shown

[0050] Figure 5 is a structural diagram of an embodiment of a hairpin alignment device

[0051] Figure 6 is a front view showing Figure 5 a specific illustrative front view of the hairpin alignment device shown

[0052] Figure 7 is Figure 6 a perspective view of the hairpin alignment device shown Figure 1 .

[0053] Figure 8 is Figure 6 a perspective view of the hairpin alignment device shown Figure 2 .

[0054] Figure 9 is a partial cross-sectional view showing Figure 6 and Figure 7 a part of the enlarged view shown

[0055] Figure 10 is an illustrative diagram showing a simplified structure of the stator

[0056] Figure 11 is an illustrative diagram showing a simplified structure of an embodiment of the clamping part

[0057] Figure 12 is an illustrative diagram showing the structure of an embodiment of the clamping device and the alignment pin

[0058] Figure 13 is an illustrative diagram showing the horizontal expansion concept of the clamping device

[0059] Figure 14 is an illustrative diagram showing the alignment example of the hairpin of an embodiment of the hairpin alignment device

[0060] Figure 15 is an illustrative diagram showing a simplified structure of an embodiment of the alignment part

[0061] Figure 16 is an illustrative diagram showing a simplified structure of an embodiment of the protection part

[0062] Figure 17 is an illustrative diagram showing the alignment result of the hairpin in a state with the protection part Detailed implementation mode

[0063] Next, with reference to the accompanying drawings, the embodiments disclosed in this specification will be described in detail. When describing the embodiments disclosed in this specification, if it is determined that the detailed description of the relevant well-known technology makes the gist of the embodiments disclosed in this specification unclear, the detailed description thereof will be omitted.

[0064] In addition, the accompanying drawings are used to help understand the embodiments disclosed in this specification. The technical ideas disclosed in this specification are not limited to the content of the accompanying drawings, but include all changes, equivalents, and substitutes belonging to the ideas and technical scope of the present invention.

[0065] The hairpin alignment device provided in this specification (hereinafter referred to as the alignment device) may be a device for aligning Figure 3 and Figure 4 the hairpins HP of the stator 1 shown.

[0066] The above alignment device may also be a device for performing a welding process after aligning the above hairpins HP.

[0067] As Figure 4 shown, among the plurality of hairpins HP protruding from the upper part of the stator 1 shown in Figure 3 the above, the plurality of hairpins HP are arranged in multiple rows and multiple columns HPC along an arc.

[0068] Among the above plurality of hairpins HP, the above multiple rows may be arranged at a predetermined interval.

[0069] That is, the rows of the above plurality of hairpins HP are arranged at a predetermined row interval.

[0070] The above plurality of hairpins HP may also form the above multiple columns HPC at a predetermined interval BC.

[0071] That is, the column arrangement HPC of the above plurality of hairpins HP can be achieved at a predetermined column interval BC.

[0072] In such a stator 1 as described above, the above plurality of hairpins HP may be arranged in an even number of rows.

[0073] In this way, in the stator 1 in which the above plurality of hairpins HP are arranged in an even number of rows, the above plurality of hairpins HP can be welded in pairs.

[0074] The positions of the protruding heads of the above plurality of hairpins HP of such a stator 1, that is, the welding target parts, are not aligned and are disrupted, and welding defects will occur when welding in an unaligned state.

[0075] Therefore, it is necessary to align the above plurality of hairpins HP of the stator 1 before welding. The embodiments of the above alignment device provided in this specification may be devices for aligning the above plurality of hairpins HP of such a stator 1.

[0076] More specifically, the above alignment device disposes a horizontally expanding clamping device between the arrangements of the above-mentioned plurality of hairpins HP, inserts the alignment pins into the clamping device to horizontally expand the clamping device, and thereby horizontally aligns the above-mentioned plurality of hairpins HP for each pair of welding objects through the expanded clamping device.

[0077] As Figure 5 shown, the above alignment device 100 includes a fixing part 10, a clamping part 20, and an alignment part 30.

[0078] The above alignment device 100 may further include a cover part 40 that protects the insulating part of the above-mentioned plurality of hairpins HP when welding the above-mentioned plurality of hairpins HP.

[0079] A specific example of the above alignment device 100 including the above fixing part 10, the above clamping part 20, and the above alignment part 30 and may further include the above cover part 40 is as Figures 6 to 9 shown.

[0080] Figure 6 is the front view of the above alignment device 100, Figure 7 and Figure 8 is Figure 6 the perspective view of the above alignment device 100 shown as Figures 6 to 8 shown. As

[0081] shown, in the above alignment device 100, the above fixing part 10 raises the stator 1 to a specific position and fixes it. The above clamping part 20 is disposed at positions corresponding to between each of the above multiple columns, and includes a plurality of clamping devices 21 respectively disposed between each of the above multiple columns when the stator 1 rises to the above specific position. The above alignment part 30 includes a plurality of alignment pins 31. When the above plurality of clamping devices 21 are respectively located between each of the above multiple columns, the alignment pins 31 are inserted into the insertion holes of each of the above plurality of clamping devices 21, horizontally expand each of the above plurality of clamping devices 21, and closely adhere to the hairpins HP arranged in the two side columns.

[0082] That is, in the above alignment device 100, when the above fixing part 10 raises the stator 1 to the above specific position, the above plurality of clamping devices 21 are respectively disposed between each of the above multiple columns of the above plurality of hairpins HP. In a state where the above plurality of clamping devices 21 are respectively disposed between each of the above multiple columns, when the above plurality of alignment pins 31 are respectively inserted into each of the above plurality of clamping devices 21, through the insertion of the above plurality of alignment pins 31, each of the above plurality of clamping devices 21 horizontally expands and closely adheres to the hairpins HP arranged on both sides, thereby aligning the above plurality of hairpins HP. Figures 6 to 8In the illustration of the above-described alignment device 100 shown, the form in which the plurality of clamping devices 21 and the alignment pins 31 are respectively disposed between the respective columns of the plurality of hairpins HP is as follows Figure 9 as shown.

[0083] Figure 9 To Figure 6 and Figure 7 In the enlarged cross-sectional view in which a part E is enlarged, when the plurality of hairpins HP are arranged in six rows (HPR1 to HPR6) and vertically protrude above the clamping device 21 and the cover portion 40, the clamping device 21 is respectively disposed between the respective columns of the plurality of hairpins HP at the specific position, and the alignment pin 31 is inserted from the rear end of the clamping device 21 to horizontally expand the clamping device 21, so that the hairpins HP in the two side columns of the clamping device 21 can be aligned.

[0084] Next, with reference to Figures 10 to 15 in which the structures of the stator 1 and the alignment device 100 are simplified, the principle and structure of the alignment device 100 for aligning the plurality of hairpins HP will be described.

[0085] The fixing portion 10 raises the stator 1 from the lower part of the alignment device 100 to the specific position and fixes it.

[0086] In the stator 1, the plurality of hairpins HP are arranged in the plurality of rows and the plurality of columns along the arc of the stator 1 and protrude upward.

[0087] In this way, as Figure 8 shown, it can be arranged in 4 rows (HPR1 to HPR4) and 8 columns (HPC1 to HPC8).

[0088] As Figure 10 shown, in the plurality of hairpins HP arranged in the plurality of rows HPR and the plurality of columns HPC in this way, the protruding portions to be welded are not aligned, so the positions of the plurality of hairpins HP can be aligned by the alignment device 100.

[0089] The fixing portion 10 may be composed of one or more devices and structures.

[0090] When the stator 1 is installed, the fixing portion 10 raises the stator 1 to the specific position until the alignment of the plurality of hairpins HP is completed, and fixes the stator 1 at the specific position.

[0091] The specific position may be a position where the plurality of hairpins HP protrude by a predetermined length or more from the position where the plurality of clamping devices 21 are disposed when the plurality of clamping devices 21 are disposed between the respective columns of the plurality of columns HPC.

[0092] That is, the above-mentioned fixing part 10 can raise the position of the above-mentioned stator 1 so that the above-mentioned plurality of hairpins HP are located at a height protruding by a specified length or more from the height of the above-mentioned plurality of clamping devices 21.

[0093] Here, the above-mentioned specified length can be more than the minimum length required for welding the above-mentioned plurality of hairpins HP.

[0094] The minimum length required for the above-mentioned welding can be, for example, 4 mm.

[0095] In this case, the above-mentioned fixing part 10 can raise the position of the above-mentioned stator 1 to a height at which the above-mentioned plurality of hairpins HP protrude by 4 mm or more from the height of the above-mentioned plurality of clamping devices 21.

[0096] Thereby, alignment of the above-mentioned plurality of hairpins HP can be achieved while ensuring the state of the welding target portions of the above-mentioned plurality of hairpins HP.

[0097] In the above-mentioned aligning device 100, the above-mentioned clamping part 20 can be constituted by one or more devices and structures.

[0098] When the above-mentioned stator 1 is Figure 10 as shown, the above-mentioned clamping part 20 including the above-mentioned plurality of clamping devices 21 is as Figure 11 shown.

[0099] The above-mentioned clamping part 20 can be formed in a circular shape larger than the above-mentioned stator 1.

[0100] In the above-mentioned clamping part 20, the above-mentioned plurality of clamping devices 21 can be formed along the circumference of the above-mentioned clamping part 20.

[0101] The above-mentioned plurality of clamping devices 21 can be provided on the outer peripheral surface of the above-mentioned stator 1 facing the center of the above-mentioned stator 1.

[0102] The above-mentioned plurality of clamping devices 21 can be arranged at positions corresponding to between each column of the above-mentioned multi-column HPC, and can be arranged between each column of the above-mentioned multi-column HPC when the above-mentioned stator 1 rises to the above-mentioned specific position.

[0103] For example, as Figure 10 shown, when the above-mentioned plurality of hairpins HP are arranged in 8 columns (HPC1 to HPC8), as Figure 11 shown, first clamping devices (21-1) to eighth clamping devices (21-8) are provided at positions corresponding to between each of the above-mentioned 8 columns (HPC1 to HPC8). Thereby, when the above-mentioned stator 1 rises to the above-mentioned specific position, the above-mentioned first clamping device (21-1) to the above-mentioned eighth clamping device (21-8) can be respectively arranged between each of the above-mentioned 8 columns (HPC1 to HPC8).

[0104] The clamping device 21 and the alignment pin 31 put into the clamping device 21 are shaped as follows: Figure 12 shown.

[0105] The clamp device 21 may include a left side portion 21L and a right side portion 21R, and an insertion hole 21H located between the left side portion 21L and the right side portion 21R and into which the alignment pin 31 is inserted.

[0106] The clamping device 21 may be disposed at a position formed on the outer peripheral surface of the stator 1 between the rows of the plurality of HPC rows.

[0107] The clamping device 21 may be formed to have a length greater than that of the plurality of rows of HPC.

[0108] The front end of the clamping device 21 may be disposed in a central direction of the stator 1 , and the rear end may be disposed in a circumferential direction of the stator 1 .

[0109] The clamping device 21 may be formed in a configuration in which the width gradually increases from the front end toward the rear end.

[0110] That is, the clamp device 21 is formed so that the width gradually increases from the front end arranged in the central direction to the rear end arranged in the circumferential direction, because the row interval of the plurality of hairpins HP gradually decreases from the circumference toward the center.

[0111] In the clamp device 21 , the insertion hole 21H is formed at the rear end, and the alignment pin 31 is inserted into the rear end and moves toward the front end.

[0112] When the alignment pin 31 is inserted into the rear end and moves toward the front end, the clamp device 21 is horizontally expanded to a degree corresponding to the width of the alignment pin 21 .

[0113] That is, Figure 13 As shown, when the alignment pin 31 is inserted into the insertion hole 21H, the interval between the left side portion 21L and the right side portion 21R of the clamp 21 is horizontally stretched and expanded due to the insertion of the alignment pin 31 .

[0114] Thus, when the clamping device 21 is horizontally expanded due to the insertion of the alignment pin 31, Figure 14 As shown, the left side 21L and the right side 21R of the clamp 21 are in contact with the two rows of hairpins HP respectively to apply force, and the hairpins HP are pressed by the clamps expanded on both sides to change their positions, thereby achieving horizontal alignment.

[0115] In addition, since the clamping device 21 is horizontally expanded to align the plurality of hairpins HP, the plurality of hairpins HP can be aligned regardless of the height.

[0116] Thus, the above clamping device 21 can freely select the height to align the plurality of hairpins HP, and can ensure the space for adding units such as the welding object part and the protective cover for setting the plurality of hairpins HP.

[0117] The above clamping device 21 can be formed with a front alignment end 21F and a rear alignment end 21B that are in close contact with the above hairpin HP when horizontally expanding on both sides of the front end and the rear end respectively.

[0118] The above front alignment end 21F and the above rear alignment end 21B can be formed in a symmetrical structure on both sides of the above clamping device 21.

[0119] The above clamping device 21 can be formed with a plurality of alignment teeth 21T corresponding to the arrangement of the above multi-row HPR on both sides.

[0120] The above alignment teeth 21T are formed in a symmetrical structure on both sides of the above clamping device 21 corresponding to the arrangement of the above multi-row HPC.

[0121] The above alignment teeth 21T are respectively formed on both sides of the above clamping device 21 at a specified interval with a quantity corresponding to the number of pairs of hairpins HP arranged in the above multi-row HPR.

[0122] Here, the quantity corresponding to the above number of pairs can represent the above number of pairs - 1.

[0123] For example, when there are 6 rows and 3 pairs of hairpins HP arranged in the above multi-column HPC, two alignment teeth 21T are respectively formed on both sides of the above clamping device 21.

[0124] That is, when 3 pairs of hairpins HP are arranged in the above multi-column HPC, the above front alignment end 21F, two alignment teeth 21T and the above rear alignment end 21B are respectively formed on both sides of the above clamping device 21, and a pair of hairpins HP can be respectively arranged between the above front alignment end 21F and the first alignment tooth (21T - 1), between the above first alignment tooth (21T - 1) and the second alignment tooth (21T - 2), and between the above second alignment tooth (21T - 2) and the above rear alignment end 21B.

[0125] The above specified interval can be the interval at which the hairpins HP arranged in the above multi-row HPR are aligned in pairs of two along the row.

[0126] That is, the above specified interval can be the interval corresponding to the length in close contact with two hairpins HP.

[0127] On the other hand, when the hairpins HP are arranged in two rows and in pairs in the above multi-column HPC, the alignment teeth 21T may not be respectively formed on both sides of the above clamping device 21.

[0128] The above-mentioned alignment teeth 21T can cause the hairpins HP arranged in the above-mentioned multiple rows HPR to be closely attached two by two when the above-mentioned clamping device 21 expands horizontally and closely adheres to the hairpins HP arranged in the two side columns.

[0129] Thus, the hairpins HP arranged in the above-mentioned multiple rows HPR are closely attached two by two for each pair of welding objects and aligned, so that the welding of the hairpins HP can be easily performed.

[0130] Refer to Figure 14 The situation where the hairpins HP are aligned by the above-mentioned clamping device 21 will be specifically described as follows: With the second clamping device (21-2) arranged between the first column HPC1 and the second column HPC2, and the third clamping device (21-3) arranged between the above-mentioned second column HPC2 and the third column HPC3, when the above-mentioned alignment pins 31 are respectively inserted into the above-mentioned multiple clamping devices 21, the above-mentioned multiple clamping devices 21 expand horizontally respectively. As a result, the hairpins HP in the second column HPC2 are respectively in contact with the right side portion (21R-1) of the first clamping device (21-1) and the left side portion (21L-2) of the above-mentioned second clamping device (21-2) on both sides, so that pressure will be applied respectively from the right side portion (21R-1) of the first clamping device (21-1) and the left side portion (21L-2) of the above-mentioned second clamping device (21-2). The hairpins HP arranged in 6 rows (HPR1 to HPR6) are closely attached two by two by the two alignment teeth 21T respectively formed on the right side portion (21R-1) of the first clamping device (21-1) and the left side portion (21L-2) of the above-mentioned second clamping device (21-2), so that they can be aligned into 3 pairs (HPR1 and HPR2, HPR3 and HPR4, HPR5 and HPR6).

[0131] Thus, the hairpins HP arranged in the above-mentioned multiple rows HPR are horizontally aligned for each pair of welding objects without height change, so that the welding of the above-mentioned multiple hairpins HP can be easily performed.

[0132] The above-mentioned clamping device 21 can be provided with more than one O-ring 21R, which expands when the above-mentioned alignment pin 31 is inserted and contracts when the above-mentioned alignment pin 31 is ejected.

[0133] Thus, when the above-mentioned alignment pin 31 is inserted, the above-mentioned O-ring 21R expands as the above-mentioned clamping device 21 expands. When the above-mentioned alignment pin 31 is ejected, as the above-mentioned O-ring 21R contracts to the state before expansion, the above-mentioned clamping device 21 returns to the state before expansion.

[0134] At least one of the above-mentioned O-rings 21R can be arranged at the end of the above-mentioned clamping device 21.

[0135] Preferably, the above O-ring 21R is respectively arranged at the front end and the end of the above clamping device 21.

[0136] In the above alignment device 100, the above alignment portion 30 may be composed of one or more devices and structures.

[0137] In the above stator 1 Figure 10 In the case shown, the above alignment portion 30 including the above multiple alignment pins 31 is as Figure 15 shown.

[0138] The above alignment portion 30 may be formed into a circular shape larger than the above stator 1.

[0139] In the above alignment portion 30, the above multiple alignment pins 31 may be arranged along the circumference of the above alignment portion 30.

[0140] The above multiple alignment pins 31 may be arranged on the outer peripheral surface of the above stator 1 facing the center of the above stator 1.

[0141] The above multiple alignment pins 31 may be arranged at positions corresponding to each of the above multiple clamping devices 21.

[0142] For example, as Figure 10 shown, when the above multiple hairpins HP are arranged in 8 columns (HPC1 to HPC8), as Figure 15 shown, the first alignment pin (31-1) to the eighth alignment pin (31-8) may be arranged at positions corresponding to each of the above multiple clamping devices 21, and the above multiple clamping devices 21 respectively correspond to each of the above 8 columns (HPC1 to HPC8).

[0143] As Figure 15 shown, when the above multiple clamping devices 21 are respectively arranged between each of the above multiple columns HPC, as Figure 13 shown, the above multiple alignment pins 31 are inserted into the insertion holes 21H of each of the above multiple clamping devices 21 to horizontally expand each of the above multiple clamping devices 21 and closely attach them to the hairpins HP arranged in the two side columns.

[0144] Such an above alignment portion 30 includes the above multiple alignment pins 31 and may further include a driving unit 32 for respectively driving the above multiple alignment pins 31.

[0145] The above driving unit 32 moves the above multiple alignment pins 31 to insert them into the above insertion holes 21H or ejects the above multiple alignment pins 31 from the above insertion holes 21H.

[0146] The above-mentioned driving unit 32, which is a unit for advancing the above-mentioned alignment pin 31 into the above-mentioned insertion hole 21H or retracting the above-mentioned alignment pin 31 from the above-mentioned insertion hole 21H, can be a cylinder / hydraulic cylinder or a motor.

[0147] When the above-mentioned fixing part 10 raises the above-mentioned stator 1 to the above-mentioned specific position and arranges the above-mentioned plurality of clamping devices 21 between the respective columns of the above-mentioned multi-column HPC, the above-mentioned driving unit 32 can insert each of the above-mentioned plurality of alignment pins 31 into the insertion hole 21H of the corresponding clamping device 21.

[0148] The above-mentioned driving unit 32 inserts each of the above-mentioned plurality of alignment pins 31 into the insertion hole 21H of the corresponding each clamping device 21, whereby when each of the above-mentioned plurality of clamping devices 21 expands horizontally, each of the above-mentioned plurality of alignment pins 31 is ejected from the above-mentioned insertion hole 21H, so that each of the above-mentioned plurality of clamping devices 21 is reset.

[0149] The above-mentioned alignment pin 31 is inserted into the above-mentioned insertion hole 21H and ejected from the above-mentioned insertion hole 21H by the above-mentioned driving unit 32 that moves the position of the above-mentioned alignment pin 31.

[0150] The above-mentioned alignment pin 31 is inserted into the above-mentioned insertion hole 21H and advances at a specified speed.

[0151] Thereby, the above-mentioned clamping device 21 can expand at a specified speed.

[0152] In this way, the above-mentioned alignment pin 31 is inserted into the above-mentioned insertion hole 21H and advances at a specified speed, so that the above-mentioned clamping device 21 expands at a specified speed and by the high-speed expansion of the above-mentioned clamping device 21, the impact applied to the hairpin HP can be prevented.

[0153] That is, it is possible to prevent the alignment of the hairpin HP from being disrupted due to the impact applied to the hairpin HP by the high-speed expansion of the above-mentioned clamping device 21, so that the alignment of the hairpin HP can be accurately performed.

[0154] The above-mentioned alignment pins 31 can be simultaneously inserted into the insertion holes 21H of each of the above-mentioned plurality of clamping devices 21.

[0155] Thereby, the above-mentioned plurality of clamping devices 21 can be simultaneously expanded horizontally.

[0156] In this way, the above-mentioned alignment pins 31 are simultaneously inserted into the above-mentioned insertion holes 21H of each of the above-mentioned plurality of clamping devices 21, so that it is possible to prevent an unbalanced force from being applied to the hairpin HP due to the difference in the expansion speed between the above-mentioned plurality of clamping devices 21.

[0157] That is, it is possible to prevent the alignment from being disrupted due to an unbalanced force applied to the hairpin HP caused by a difference in the expansion speed between the plurality of clamping devices 21 described above, and thus the hairpin HP can be accurately aligned.

[0158] The above-mentioned alignment pin 31 is inserted into the above-mentioned insertion hole 21H and can maintain the inserted state during a specified time period after the above-mentioned clamping device 21 is horizontally expanded.

[0159] Here, the above-mentioned specified time period can be the time when each of the plurality of clamping devices 21 abuts against the plurality of hairpins HP and the alignment of the plurality of hairpins HP is completed.

[0160] The above-mentioned alignment pin 31 can also maintain the inserted state until the welding of the plurality of hairpins HP is completed after the alignment of the plurality of hairpins HP is completed.

[0161] The above-mentioned alignment pin 31 can be formed to have a lateral width equal to or less than the length obtained by adding the intervals between both sides of the above-mentioned clamping device 21 and the hairpins HP in two rows when the above-mentioned clamping device 21 is disposed between two rows.

[0162] That is, the above-mentioned clamping device 21 can be horizontally expanded by an extent corresponding to the width of the above-mentioned alignment pin 31, and the width of the above-mentioned alignment pin 31 is formed to have a lateral width equal to or less than the length obtained by adding the intervals between both sides of the above-mentioned clamping device 21 and the hairpins HP in two rows.

[0163] On the other hand, the above-mentioned alignment device 100 including the above-mentioned fixing portion 10, the above-mentioned clamping portion 20, and the above-mentioned alignment portion 30 further includes the above-mentioned cover portion 40. When welding the plurality of hairpins HP after aligning the plurality of hairpins HP, the cover portion 40 protects the plurality of hairpins HP from spatter generated during welding, so that the insulating portions of the plurality of hairpins HP can be protected from the spatter when welding the plurality of hairpins HP.

[0164] As Figures 5 to 9 shown, the above-mentioned cover portion 40 can be a cover that covers the upper portion of the above-mentioned stator 1.

[0165] When the above-mentioned stator 1 is Figure 10 as shown, the above-mentioned cover portion 40 is as Figure 16 shown.

[0166] The above-mentioned cover portion 40 is formed with a plurality of protruding holes 40H at positions corresponding to the respective arrangements of the above-mentioned multi-rows HPC. When the above-mentioned stator 1 is located at the above-mentioned specific position, the plurality of hairpins HP can penetrate through the plurality of protruding holes 40H and protrude.

[0167] For example, when the above-described multi-column HPCs are arranged in eight (HPC1 to HPC8), eight of the above-described protruding holes 40H may be provided at positions corresponding to the respective columns of the above-described multi-column HPCs.

[0168] Thus, as Figure 16 shown, the hairpins HP arranged in the above-described multi-column HPCs can protrude upward from the above-described cover portion 40 through the above-described protruding holes 40H.

[0169] The above-described cover portion 40 may be in the form of a disk disposed above the above-described plurality of clamping devices 21.

[0170] In the above-described cover portion 40, the above-described plurality of hairpins HP penetrate through the above-described protruding holes 40H and protrude from the above-described protruding holes 40H by a length of more than a specified length.

[0171] The above-described specified length is, for example, 4 mm.

[0172] That is, the above-described plurality of hairpins HP penetrate through the above-described protruding holes 40H and can protrude by 4 mm or more.

[0173] The above-described protruding holes 40H are formed to have an area exceeding the area of one column of the above-described hairpin HP and within 1.2 times the area.

[0174] Thus, the area for protecting the above-described plurality of hairpins HP during the above-described spattering can be maximized, and stable welding can be achieved.

[0175] Even when the above-described plurality of hairpins HP are disposed above the above-described clamping portion 30 in the above-described cover portion 40, the above-described plurality of hairpins HP can be Figure 17 aligned as shown.

[0176] Figure 17 To show an example diagram of the alignment achieved when the above-described cover portion 40 is provided and the above-described plurality of hairpins HP protrude through the above-described protruding holes 40H, only the protruding portions corresponding to the welding target portions among the above-described plurality of hairpins HP are aligned in pairs through the above-described clamping portion 20 in a state of protruding above the above-described cover portion 40, and the insulating portions other than the above-described protruding portions are below the above-described cover portion 40, so they can be protected during welding.

[0177] As described above, the above-described alignment device 100 aligns the above-described plurality of hairpins HP in a horizontal alignment manner for each pair of welding targets without changing the height through the above-described clamping device 21. Therefore, not only is welding easy, but the structure for providing the above-described cover portion 40 can be ensured, and thus the above-described cover portion 40 can be provided.

[0178] Thus, not only can the alignment and welding accuracy of the above-described plurality of hairpins HP be improved, but the insulating portions of the above-described plurality of hairpins HP can be protected from welding spatter, thereby improving safety and reliability.

[0179] As described above, embodiments of the above alignment device 100 have been described. However, within the scope not departing from the present invention, various modifications can be made to the described embodiments. The scope of the present invention should not be defined only by the described embodiments, but should be defined according to the claims described below and the equivalents thereof.

Claims

1. A hairpin alignment device, characterized in that, Comprising: A fixing part that raises the stator to a specific position and fixes it. The stator is formed by arranging a plurality of hairpins protruding from the upper part in multiple rows and columns along an arc. A clamping part that is disposed at positions corresponding to between each of the multiple columns, and includes a plurality of clamping devices that are disposed between each of the multiple columns when the stator rises to the specific position. And An alignment part that includes a plurality of alignment pins. When the plurality of clamping devices are located between each of the multiple columns, the alignment pins are inserted into the insertion holes of each of the plurality of clamping devices to horizontally expand and closely adhere the plurality of clamping devices to the hairpins arranged in the two side columns respectively.

2. The fixing device according to claim 1, wherein In the stator, the plurality of hairpins are arranged in an even number of rows.

3. The hairpin alignment device according to claim 1, wherein The specific position is a position where the plurality of hairpins protrude by a specified length or more from the position where the plurality of clamping devices are respectively disposed when the plurality of clamping devices are respectively disposed between each of the multiple columns.

4. The hairpin alignment device according to claim 1, wherein The front end of each of the plurality of clamping devices is disposed in the central direction of the stator, and the rear end is disposed in the circumferential direction of the stator.

5. The hairpin alignment device according to claim 1, wherein Each of the plurality of clamping devices is formed in a shape where the width becomes wider as it approaches the rear end from the front end.

6. The hairpin alignment device according to claim 1, wherein In each of the plurality of clamping devices, the insertion hole is formed at the rear end, and the alignment pin is inserted into the rear end and advances forward to horizontally expand to a degree corresponding to the width of the alignment pin.

7. The hairpin alignment device according to claim 1, wherein Each of the plurality of clamping devices is formed with a plurality of alignment teeth corresponding to the arrangement of the multiple rows on both sides.

8. The hairpin alignment device according to claim 7, wherein The alignment teeth are respectively formed at a specified interval on both sides of the clamping device in a number corresponding to the number of pairs of hairpins arranged in the multiple rows.

9. The hairpin alignment device according to claim 7, wherein When the clamping device is horizontally expanded and closely adheres to the hairpins arranged in the two side columns, the alignment teeth closely adhere the hairpins arranged in the multiple rows two by two.

10. The hairpin alignment device according to claim 1, wherein Each of the plurality of clamping devices is provided with one or more O-rings that expand when the alignment pin is inserted and contract when the alignment pin is ejected.

11. The hairpin alignment device according to claim 10, wherein At least one of the O-rings is provided at the end of the clamping device.

12. The hairpin alignment device according to claim 1, wherein The alignment part further includes: a driving unit that moves the plurality of alignment pins to insert them into the insertion holes or eject them from the insertion holes.

13. The hairpin alignment device according to claim 1, wherein the plurality of alignment pins are inserted into the insertion holes and advance at a predetermined speed.

14. The hairpin alignment device according to claim 1, wherein the plurality of alignment pins are simultaneously inserted into the insertion holes of each of the plurality of clamping devices.

15. The hairpin alignment device according to claim 1, wherein the plurality of alignment pins are inserted into the insertion holes and remain inserted for a predetermined period after the plurality of clamping devices expand horizontally.

16. The hairpin alignment device according to claim 1, wherein the plurality of alignment pins are formed to have a lateral width equal to or less than the sum of the intervals between the two sides of the clamping device and the hairpins in two rows when the clamping device is disposed between the two rows.

17. The hairpin alignment device according to claim 1, wherein the hairpin alignment device further comprises: a cover portion that forms a plurality of protruding holes at positions corresponding to each arrangement of the plurality of rows, and when the stator is located at the specific position, the plurality of hairpins penetrate through the plurality of protruding holes and protrude.

18. The hairpin alignment device according to claim 17, wherein the cover portion is in a disk shape provided on the upper part of the plurality of clamping devices.

19. The hairpin alignment device according to claim 17, wherein in the cover portion, the plurality of hairpins penetrate through the protruding holes and protrude from the protruding holes by a length of a predetermined length or more.

20. The hairpin alignment device according to claim 17, wherein the protruding holes are formed to have an area exceeding the area of one row of the hairpins and within 1.2 times the area.

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