KR20220124392A - Stator manufacturing device - Google Patents

Abstract

According to an embodiment of the present invention, the present invention includes: a plurality of twisting jigs in which an insertion unit, into which a coil end of a hair pin is inserted, is formed and corresponding to the coil end one on one; an inner guide guiding the innermost coil end among a plurality of coil ends; and an outer guide disposed on an outer side of the inner guide and guiding the outermost coil end among the plurality of coil ends. In at least one even-numbered twisting jig among the plurality of twisting jigs, an extension unit broadening a gap between even-numbered coil ends and odd-numbered coil ends among the plurality of coil ends may be formed.

Description

Stator manufacturing device

The present invention relates to motor manufacturing equipment, and more particularly, to stator manufacturing equipment having a twisting jig for twisting a coil.

A motor (or electric motor) is a device that converts electrical energy into mechanical energy by using the force received by a conductor through which an electric current flows in a magnetic field.

The motor may include a rotating shaft, a stator and a rotor, and the stator includes a stator core and a coil.

When manufacturing the motor as described above, the coil may be wound in a slot formed in the stator core.

Korean Patent Publication No. 10-2020-0093509 A (published on August 05, 2020) discloses a motor for a vehicle, the motor comprising: a stator core having a plurality of slots spaced apart along a circumferential direction; and a plurality of wire rods made of a coil coupled to the stator core and respectively disposed in the slots, wherein the wire rods are disposed in any one of the slots, and upper and lower portions exposed from the stator core are the stator core Twisted to extend obliquely along the circumferential direction of

Another example of the motor may be a motor having a coil winding (hereinafter, referred to as a 'hairpin winding motor'), and the hairpin winding motor is arranged in each slot after inserting and fastening a plurality of hairpins into each slot of the stator core. By welding the hairpins sequentially, the coil windings of the stator core are formed.

Republic of Korea Patent Publication No. 10-2020-0016088 A (published on February 14, 2020) discloses a method for manufacturing a stator using a jig in a hairpin winding motor, and a method for manufacturing a stator using a jig in a hairpin winding motor is a stator using a hairpin. After being inserted and fastened into the slot of the core and bent, each of the connecting ends of the plurality of hairpins is brought into close contact with the connecting end to be welded by using the first disk-shaped jig and the second disk-shaped jig and spaced apart from the connecting end to be welded. to align and press.

The first disk-shaped jig is formed with a plurality of first insertion holes into which connection ends of hairpins disposed in a radial direction of the stator core are inserted.

In addition, the second disk-shaped jig is formed with a second insertion hole overlapping the first insertion hole, and alignment protrusions protruding in the horizontal direction are provided in each of the second insertion holes.

The alignment protrusion has a structure inserted between the connection ends of the plurality of hairpins in a horizontal direction, and each of the connection ends of the plurality of hairpins is closely contacted with the connection end to be welded and spaced apart from the connection end to be welded to align and pressurize

Republic of Korea Patent Publication No. 10-2020-0093509 A (published on August 05, 2020) Republic of Korea Patent Publication No. 10-2020-0016088 A (published on February 14, 2020)

It is an object of the present invention to provide a stator manufacturing equipment that can reliably secure a gap between coils with a simple structure and a simple process.

Another object of the present invention is to provide a stator manufacturing equipment in which both a twisting process and a process for securing a gap between coils can be performed by a twisting jig.

A plurality of twisting jigs having an insert into which the coil end of the coil is inserted according to an embodiment of the present invention is formed, and 1:1 corresponding to the coil end; an inner guide for guiding the innermost coil end among the plurality of coil ends; It may include an outer guide disposed outside the inner guide and guiding the outermost coil end among the plurality of coil ends.

At least one of the even-numbered twisting jigs among the plurality of twisting jigs may be formed with an extension that spreads apart between the even-numbered coil ends and the odd-numbered coil ends among the plurality of coil ends.

The extended part may have an inlet part having a shape that gradually becomes thinner toward the upper side.

The inlet portion may have an inclination angle of 15° to 25°.

The coil end may include a peeling skin without a coating layer, and a non peeling skin having a coating layer.

The tip angle of the peeling skin may have an inclination angle of 15° to 25°.

When the coil end is completely inserted into the insertion part at the lower part of the extension part, a step facing the periphery of the peeling skin may be formed.

In the odd-numbered twisting jig among the plurality of twisting jigs, when the coil end is completely inserted into the inserting part, a contact part that comes into contact with the peeling skin may be formed.

A height of an upper end of the contact part may be lower than a height of an upper end of the extension part.

A gap through which a plurality of coil ends pass may be formed between the outer surface of the inner guide and the inner surface of the outer guide.

Each of the outer surface of the inner guide and the inner surface of the outer guide may be convex.

Each of the outer surface of the inner guide and the outer surface of the outer guide may include a guide inlet, and an angle of the guide inlet may have an inclination angle of 15° to 25°.

According to an embodiment of the present invention, at least one of the even-numbered twisting jigs among the plurality of twisting jigs is formed with an extension that spreads apart between the even-numbered coil end and the odd-numbered coil end, the twisting jig performs the twisting process and between the coils Since all steps of securing the gap can be performed, there is no need to provide a separate jig for securing the gap between the coils separately from the twisting jig, and there is an advantage in that the manufacturing process and structure are simple.

1 is a perspective view of an upper finger holding a stator according to an embodiment of the present invention;
2 is a cross-sectional view when a plurality of coil ends enter the stator manufacturing equipment according to an embodiment of the present invention;
3 is a cross-sectional view when a plurality of coil ends are entering the plurality of twisting jigs according to an embodiment of the present invention;
4 is a cross-sectional view when the plurality of coil ends shown in FIG. 3 are entered into a plurality of twisting jigs;
5 is a cross-sectional view when a plurality of coil ends shown in FIG. 4 are discharged from a plurality of twisting jigs;
6 is an enlarged view when the extension of the sixth twisting jig among the plurality of twisting jigs according to an embodiment of the present invention starts to spread between the sixth coil end and the seventh coil end;
7 is an enlarged view while the seventh coil end shown in FIG. 6 is inserted into the seventh twisting jig and the eighth coil end is inserted into the eighth twisting jig;
8 is an enlarged view when the seventh coil end shown in FIG. 7 is inserted into the seventh twisting jig, and the eighth coil end is inserted into the eighth twisting jig;
9 is a diagram illustrating a process in which the fifth and sixth coil ends are inserted into a fifth twisting jig and a sixth twisting jig among a plurality of twisting jigs according to an embodiment of the present invention;
10 is a diagram illustrating a process in which a third twisting jig and a fourth twisting jig among a plurality of twisting jigs are inserted into the third and fourth coil ends according to an embodiment of the present invention;
11 is a diagram illustrating a process in which a first coil end and a first coil end are inserted into a first twisting jig and a second twisting jig among a plurality of twisting jigs according to an embodiment of the present invention;
12 is a plan view illustrating a stator manufacturing equipment according to another embodiment of the present invention.
13 is a side view showing a stator manufacturing equipment according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with drawings.

1 is a perspective view when an upper finger holds a stator according to an embodiment of the present invention.

The hairpin T may be inserted into a slot formed in the stator core SC to be coupled to the stator core SC, and may constitute a stator of the motor together with the stator core SC.

The stator core SC may be formed in a hollow shape, and the slot may be formed on the inner circumference of the stator core. A plurality of slots may be formed in the stator core SC, and the plurality of slots may be spaced apart from each other in a circumferential direction.

The stator of the motor may include a plurality of hairpins (T). Each of the plurality of hairpins T may be a unit coil, and after being installed on the stator core SC, they may be joined to each other by laser welding or the like to constitute a coil of the stator.

The hairpin T may be disposed in a ∩ shape or a ∧ shape on the stator core SC, and may be coupled to the stator core SC so that a part thereof is inserted into the slot.

The hairpin T may include a pair of leg parts and a head part connecting the pair of leg parts, any one of the pair of leg parts is inserted into any one of a plurality of slots, and the other one of the pair of leg parts is inserted into the other one of the plurality of slots.

When the hairpin T is installed on the stator core SC, the head part is positioned above the stator core SC, and the lower part of the pair of leg parts may protrude below the stator core SC.

The end of the hairpin T may be defined as a coil end CE, and when the hairpin T is inserted into the stator core SC, the coil end SC may be exposed to the outside of the stator core SC. have. The coil end SC may be located below the stator core SC.

The stator manufacturing equipment may include an upper finger UF for moving the hairpin T.

The upper finger UF may be detachably coupled to the stator core SC, and the upper finger UF may move the hairpin T through the stator core SC.

The stator manufacturing equipment of the present embodiment is a manufacturing equipment capable of radially extending the spacing between the plurality of coil ends CE of the hairpin motor and twisting the plurality of coil ends SC.

A plurality of coil ends (CE) constituting the hairpin motor are joined by a welding process using laser welding, etc., by a pair of coil ends, and a straight coil end (i.e., welding target) is connected to another coil end (i.e., to be welded) during the welding process. , non-welding target), short-circuit failure may occur.

To prevent such a short circuit in advance, it is desirable to extend the interval by tying a pair of straight coil ends (SC), and after extending the interval, hairpins ( It is preferable to twist C).

Figure 2 is a cross-sectional view when a plurality of coil ends enter the stator manufacturing equipment according to an embodiment of the present invention, Figure 3 is a plurality of coil ends in the middle of entering a plurality of twisting jig according to an embodiment of the present invention 4 is a cross-sectional view of the plurality of coil ends shown in FIG. 3 when the entry into a plurality of twisting jigs is completed, and FIG. 5 is a plurality of coil ends shown in FIG. 4 when discharged from a plurality of twisting jigs Cross-section,

As shown in FIGS. 2 to 5, the stator manufacturing equipment includes a plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8), and an inner guide (9). ) and an outer guide 10 .

Hereinafter, when a plurality of coil ends (CE) are separately described, reference numerals 11, 12, 13, 14, 15, 16, 17, 18 will be used together and described, and a common description of a plurality of coil ends (CE) will be described with reference to CE.

When the plurality of hairpins C are coupled to the stator core SC, see FIG. 1 , the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 are connected to the stator. It may be sequentially disposed in the radial direction R of the core SC.

The coil end CE may include a peeling skin D without a coating layer E, and a non-removing part ND having a coating layer E formed thereon.

Before the coil end (CE) is inserted into the stator core (SC, see FIG. 1), a part of the coating layer (E) may be peeled off, and the stripping skin (D) from which the coating layer (E) is removed and the coating layer (E) are The non-removed vitali part ND may be included.

The stripping skin (D) may be located below the coil end (CE). The outer surface of the peeling skin (D) may be defined as the peeling surface (S) from which the coating layer (E) is removed.

Since the stripping skin (D) does not include the coating layer (E), the cross-sectional area of the stripping skin (D) may be smaller than the cross-sectional area of the vitrification part (ND).

The stripping skin D may include a tip TIP whose cross-sectional area is gradually reduced toward the lower side. The tip TIP may have a substantially sharp shape. The stripping surface S of the tip TIP may be formed to be inclined at a predetermined angle.

The stripping surface S of the tip TIP may have an inclined angle θ1 inclined at a predetermined angle.

The stripping surface (S) of the tip (TIP) allows the stripping skin (D) to easily enter the twisting jig (1) (2) (3) (4) (5) (6) (7) (8). It is preferable to have an inclination angle θ1 that exists.

The inclination angle (θ1) is the stripping surface (S) twisting jig (1) (2) (3) (4) (5) (6) (7) (8), inner guide (9) and outer guide (10) It is preferable that the angle can be minimized by engraving.

The tip (TIP) angle of the peeling skin (D) may have an inclination angle (θ1) of 15 ° to 25 °. Here, the inclination angle θ1 may be defined as an angle between the inclined surface S and a vertical line.

The peeling skin (D) may be peeled to have an inclined surface (S) of 15° to 25° (eg, 20°).

Each of the plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) is a coil end of a hairpin (11) (12) (13) (14) (15) An insert into which each of (16), (17) and (18) is inserted may be formed.

A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) may be sequentially arranged in the radial direction (R).

Each of the rotating shafts may be connected to the plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8). A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) can be rotated independently of each other. A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) may be respectively connected to a rotating mechanism such as a motor to the rotating shaft connected to each.

The plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) can be rotated clockwise or counterclockwise.

A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) can be rotated sequentially.

Twisting jig (1) (2) (3) (4) (5) (6) (7) (8), as shown in Figures 2 to 4, the coil ends (11) (12) (13) (14) (15) (16) (17) (18) may correspond to 1:1, and one coil end may be inserted into one twisting jig.

The inner guide 9 may be disposed above the innermost twisting jig 1 . The inner guide 9 may be formed with a receiving portion in which a part of the innermost twisting jig 1 is accommodated.

The outer guide 10 may be disposed outside the inner guide 9 .

The outer guide 10 may be disposed above the outermost twisting jig 8 . The inner guide 9 may be formed with a receiving portion in which a portion of the outermost twisting jig 10 is accommodated.

Between the outer surface 92 of the inner guide 9 and the inner surface 102 of the outer guide 10, a plurality of coil ends 11, 12, 13, 14, 15, 16, 17, 18 A gap (G) through which ) may be formed.

The upper finger (UF, see Fig. 1) is a plurality of coil ends 11, 12, 13, 14, 15, 16, 17, 18 at the initial entry of the, as shown in Fig. 2, The plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 can be lowered by the gap G between the inner guide 9 and the outer guide 10. have.

A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) can be lifted by a jig lifting mechanism (not shown), as shown in FIG. have.

A plurality of coil ends (11) (12) (13) (14) (15) (16) (17) (18) is lowered, twisting jig (1) (2) (3) (4) (5) (6) As the (7) (8) is raised, the plurality of coil ends (11) (12) (13) (14) (15) (16) (17) (18) are formed on the outer surface of the inner guide (9). It may be initially inserted into the gap G between the 92 and the inner surface 102 of the outer guide 10 .

As shown in FIG. 2, the inner guide 9 includes the innermost coil end 11 among the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18. As shown in FIG. 2, the outer guide 10 is the outermost coil among the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18. The end 18 can be guided.

Before the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 are inserted into the gap G between the inner guide 9 and the outer guide 10, The location dispersion may be large.

As shown in FIG. 2 , by the inner guide 9 and the outer guide 10, the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, 18, entry positions can be determined, and dispersion between the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 can be reduced.

Each of the outer surface 92 of the inner guide 9 and the inner surface 102 of the outer guide 10 may include guide inlet portions F1 and F2.

The guide inlet portion F1 of the inner guide 9 and the guide inlet portion F2 of the outer guide 10 may be formed to be inclined at an angle gradually increasing toward the upper side.

The angle of the guide inlet portions F1 and F2 may have an inclination angle θ1 of 15° to 25°.

The guide inlet portion F1 of the inner guide 9 and the guide inlet portion F2 of the outer guide 10 can be angularly synchronized with the inclined surface S of the tip TIP, and the insertion of the coil end CE can induce

The guide inlet portion F1 of the inner guide 9 and the guide inlet portion F2 of the outer guide 10 may have an inclination angle θ1 of 15° to 25°, similar to the angle of the tip TIP. Here, the inclination angle θ1 may be defined as an angle between the guide inlet F1 and the vertical line.

The outer surface 92 of the inner guide 9 may guide the entry of the innermost coil end 11 , and its guide inlet F1 guides the initial insertion of the tip TIP of the innermost coil end 11 . can do.

The inner surface 102 of the outer guide 10 may guide the entry of the outermost coil end 18 , and the guide inlet portion F1 guides the initial insertion of the tip TIP of the outermost coil end 18 . can do.

When the angle of the slope (S) of the tip (TIP) and the angle of the guide inlet (F1) (F2) are large, such as 50°, the stripping surface (S) of the stripping skin (D) is the inner guide (8) and the outer guide (9), the peeling skin (D) may not be easily inserted between the inner guide (8) and the outer guide (9).

On the other hand, when the angle of the inclined surface S of the tip TIP and the angle of the guide inlet portions F1 and F2 have an inclination angle θ1 of 15° to 25°, the insertion of the coil end CE may be induced. can

Each of the outer surface 92 of the inner guide 9 and the inner surface 102 of the outer guide 10 may be formed to be convex.

The outer surface 92 of the inner guide 9 may be convex toward the inner surface 102 of the outer guide 10 .

The inner surface 102 of the outer guide 10 may be convex toward the outer surface 92 of the inner guide 9 .

As described above, when the outer surface 92 of the inner guide 9 is convex and the inner surface 102 of the outer guide 10 is convex, the innermost coil end 11 and the outermost coil end 18 are While being guided by the inner guide 9 and the outer guide 10, the bending may be induced.

Each of the outer surface 92 of the inner guide 9 and the inner surface 102 of the outer guide 10 may include a streamlined portion, the streamlined portion having a radius of curvature R1 that minimizes wrinkling of the coil end CE ( R2) may have.

The thickness of the coil end CE may be less than 3 mm, for example, 2.46 mm, and the radius of curvature R1 (R2) of the streamlined portion may be 3 mm to 5 mm.

The outer surface 92 of the inner guide 9 may include an inner streamlined portion having a radius of curvature R1 of 5 mm, and the inner surface 102 of the outer guide 10 is an outer streamlined portion having a radius of curvature R2 of 3 mm. may include wealth.

The upper end height of the inner guide 9 may be higher than the upper end height of the outer guide 10 , and the radius of curvature R1 of the inner streamlined portion may be greater than the curvature radius R2 of the outer streamlined segment.

If the radius of curvature R1 (R2) of the streamlined part is smaller than the thickness of the coil end CE, when the coil end CE is inserted, the friction coefficient of the slope skin ND becomes high and wrinkles on the slope skin ND This can happen.

On the other hand, when the radius of curvature R1 (R2) of the streamlined portion is formed to be greater than the thickness of the coil end CE, the friction coefficient and the generation of wrinkles can be minimized.

A plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8) are odd-numbered twisting jigs (1) (3) (5) (7) and even-numbered twisting jigs (1) (3) (5) (7) Twisting jigs (2) (4) (6) (8) may be included.

At least one (2) (4) (6) of the even-numbered twisting jigs (2) (4) (6) (8) has a plurality of coil ends (11) (12) (13) (14) (15) (16). ) (17) (18) of the even-numbered coil ends (12), (14) (16) and the odd-numbered coil ends (11, 13, 14) of the extension parts 32, 34, and 36 can be formed.

The extensions 32, 34, and 36 may function to spread the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 in two bundles. , the even-numbered twisting jigs (2), (4), (6) (8) of the outermost twisting jig (8) may not be formed with an extension.

For example, in the second twisting jig 2 from the inside to the outside, an extension part 32 (first extension part) for expanding the interval between the second coil end 12 and the third coil end 13 is provided. can be formed.

In addition, the fourth twisting jig (4) may be formed with an extension (34, second extension) extending the distance between the fourth coil end (14) and the fifth coil end (15).

In addition, the sixth twisting jig (6) may be formed with an extension (36, third extension) extending the interval between the sixth coil end (16) and the seventh coil end (17).

As shown in FIG. 2 , the extensions 32 , 34 , and 36 may have an inlet portion F3 having a shape that gradually becomes thinner toward the upper side. The inlet portion F3 may have an inclination angle θ1 of 15° to 25°.

The angle θ1 of the inlet F3 may be synchronized with the angle of the inclined surface S of the tip TIP.

The angle θ1 of the inlet portion F3 may be the same as the angle of the inclined surface S of the tip TIP, and the peeling surface S of the tip TIP is guided to the inlet portion F3 to be gently inserted. have.

The angle of the inclined surface S of the tip, the angle of the guide inlet portions F1 and F2, and the angle of the inlet portion F3 are the same, and this angle is the inclination angle θ1 in the range of 15° to 25° When having, the friction force can be reduced than when the angle of the inclined surface S of the tip TIP is 50°.

Multiple Twisting Jig(1)(2)(3)(4)(5)(6)(7)(8) Multiple Coil End(11)(12)(13)(14)(15)(16) (17) (18) in a fixed state, as shown in Figure 3, can be raised, a plurality of coil ends (1) (2) (3) (4) (5) (6) ( 7) and (8) are opened in groups of two by extensions 32, 34 and 36.

As shown in FIG. 4 , steps 42, 44, and 46 may be formed in the lower portions of the extensions 32, 36, and 36. As shown in FIG. The step portions 42 , 44 , and 46 may be formed to be thicker than the extension portions 32 , 36 , 36 under the extension portions 32 , 36 , and 36 .

When the coil end CE is fully inserted into the insertion portion, the step portions 42, 44, and 46 may face the periphery of the stripping skin (D).

In some (2) (4) (6) of the plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8), an upwardly erected bulkhead may be formed, The stepped portions 42, 44, and 46 may be defined as portions having a thick lower portion of the partition wall, and the expanded portions 32, 36, and 36 may include the stepped portions 42, 44, and 46. It may be defined as a portion formed with a thin thickness on the upper portion of the .

When the coil end CE is maximally inserted into the insertion part, a part of the slope skin ND may face the extension parts 32, 36, and 36 in the horizontal direction, and the peeling skin D is a step part ( 42, 44, and 46 may face each other in the horizontal direction.

In at least one of the odd-numbered twisting jigs 3, 5, and 7, when the coil end CE is fully inserted into the insertion portion, the contact portions 33, 35, and 37 that come into contact with the stripping skin D are provided. can be formed.

When the coil end CE is maximally inserted into the insertion portion, the peeling skin D may face the contact portions 33 , 35 and 37 .

The height of the upper ends of the contact portions 33 , 35 , and 37 may be lower than the height of the upper ends of the extension portions 32 , 34 , and 36 .

A plurality of coil ends (11) (12) (13) (14) (15) (16) (17) (18) has an extension (32) (36) (36) and a step (42) (44) (46) As the position is aligned by the and contact portions 33, 35 and 37, it may be spaced apart in groups of two.

Coil ends (11) (12) (13) (14) (15) (16) (17) (18) twisting jig (1) (2) (3) (4) (5) (6) (7) ) (8), the twisting jig (1) (2) (3) (4) (5) (6) (7) (8) can be rotated independently of each other, and the coil end (11) (12) (13) (14) (15) (16) (17) (18) can be twisted independently of each other.

After a plurality of coil ends (11) (12) (13) (14) (15) (16) (17) (18) are spread out in two bundles, a plurality of twisting jigs (1) (2) (3) ( 4) (5) (6) (7) (8), the inner guide (9) and the outer guide (10) can be lowered as shown in FIG. 4 by a jig lifting mechanism, and a plurality of coil ends (11) ) (12) (13) (14) (15) (16) (17) (18) may be discharged between the inner guide (9) and the outer guide (10).

Hereinafter, a process in which the plurality of coil ends are inserted into the plurality of twisting jigs will be described in detail with reference to FIGS. 6 to 11 .

A plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 are twisted in the order from the outermost coil end 18 to the innermost coil end 11. It can be inserted into a jig (1) (2) (3) (4) (5) (6) (7) (8).

6 is an enlarged view when the extension of the sixth twisting jig among the plurality of twisting jigs according to an embodiment of the present invention starts to spread between the sixth coil end and the seventh coil end, and FIG. 7 is shown in FIG. The illustrated seventh coil end is inserted into the seventh twisting jig and the eighth coil end is inserted into the eighth twisting jig, and FIG. 8 is an enlarged view of the seventh coil end shown in FIG. It is an enlarged view when the insertion is completed with the Sting jig, and the 8th coil end is inserted with the 8th twisting jig.

As shown in FIG. 6 , when the seventh coil end 17 and the eighth coil end 18 are initially inserted into the seventh twisting jig 7 and the eighth twisting jig 8 , the seventh The coil end 17 is gradually moved away from the sixth coil end 16 by the extension 36 of the sixth twisting jig 6 .

7, the seventh coil end 17 and the eighth coil end 18 can be gradually inserted into the seventh twisting jig 7 and the eighth twisting jig 8, The eight-coil end 18 is bent in a minute curve by the streamlined portion of the inner surface 102 of the outer guide 10 and is inserted into the eighth twisting jig 9 .

8, the seventh coil end 17 and the eighth coil end 18 can be maximally inserted into the seventh twisting jig 7 and the eighth twisting jig 8, and the At the time of maximum insertion, the stripping part D of the seventh coil end 17 is in contact with the contact part 37 of the seventh twisting jig 7 , and the seventh coil end 17 and the eighth coil end 18 are in contact with each other. The shape of the hairpin may be completed by the sixth twisting jig 6 , the seventh twisting jig 7 , the eighth twisting jig 8 , and the outer guide 10 .

9 is a diagram illustrating a process in which the fifth and sixth coil ends are inserted into a fifth twisting jig and a sixth twisting jig among a plurality of twisting jigs according to an embodiment of the present invention;

Fig. 9 (a) is a view when the fifth coil end and the sixth coil end are initially inserted, Fig. 9 (b) is a view when the fifth coil end and the sixth coil end are being inserted, and Fig. 9 (c) is a diagram when the end of the 5th coil and the end of the 6th coil are maximally inserted.

As shown in FIG. 9 ( a ), the fifth coil end 15 and the sixth coil end 16 are initially inserted into the fifth twisting jig 5 and the sixth twisting jig 6 . , the fifth coil end 15 is gradually moved away from the fourth coil end 14 by the extension 34 of the fourth twisting jig 4, and the sixth coil end 16 is the sixth twisting jig It gradually moves away from the seventh coil end 17 by the extension 36 of (6).

As shown in FIG. 9 (b), the fifth coil end 15 and the sixth coil end 16 can be gradually inserted into the fifth twisting jig 5 and the sixth twisting jig 6 . And, the stripping skin D of the sixth coil end 16 is gradually inserted without interfering with the step portion 46 of the sixth twisting jig 6 .

As shown in Fig. 9 (c), the fifth coil end 15 and the sixth coil end 16 can be maximally inserted into the fifth twisting jig 5 and the sixth twisting jig 6 . And, at the time of its maximum insertion, the stripping part D of the fifth coil end 15 is in contact with the contact part 35 of the fifth twisting jig 5, and the fifth coil end 15 and the sixth coil end Reference numeral 16 indicates that the shape of the hairpin may be completed by the fourth twisting jig 4 , the fifth twisting jig 5 and the sixth twisting jig 6 .

10 is a diagram illustrating a process in which a third twisting jig and a fourth twisting jig among a plurality of twisting jigs are inserted into the third and fourth coil ends according to an embodiment of the present invention;

FIG. 10 (a) is a diagram when the third coil end and the fourth coil end are initially inserted, FIG. 10 (b) is a diagram when the third coil end and the fourth coil end are being inserted, and FIG. 10 (c) is a diagram when the end of the third coil and the end of the fourth coil are maximally inserted.

As shown in FIG. 10 ( a ), the third coil end 13 and the fourth coil end 14 are initially inserted into the third twisting jig 3 and the fourth twisting jig 4 . , the third coil end 13 is gradually moved away from the second coil end 12 by the extension 32 of the second twisting jig 2, and the fourth coil end 14 is the fourth twisting jig It gradually moves away from the fifth coil end 15 by the extension 34 of (4).

As shown in FIG. 10 ( b ), the third coil end 13 and the fourth coil end 14 can be gradually inserted into the third twisting jig 3 and the fourth twisting jig 4 . and, the stripping skin D of the fourth coil end 14 is gradually inserted without interfering with the step 44 of the fourth twisting jig 4 .

As shown in FIG. 10 ( c ), the third coil end 13 and the fourth coil end 14 can be maximally inserted into the third twisting jig 3 and the fourth twisting jig 4 . And, at the time of its maximum insertion, the stripping part D of the third coil end 13 is in contact with the contact part 33 of the third twisting jig 3, and the third coil end 13 and the fourth coil end At (14), the shape of the hairpin may be completed by the second twisting jig 2 , the third twisting jig 3 , and the fourth twisting jig 4 .

11 is a diagram illustrating a process in which a first coil end and a first coil end are inserted into a first twisting jig and a second twisting jig among a plurality of twisting jigs according to an embodiment of the present invention;

Fig. 11 (a) is a view when the first coil end and the second coil end are initially inserted, Fig. 11 (b) is a view when the first coil end and the second coil end are being inserted, and Fig. 11 (c) is a view when the first coil end and the first coil end are maximally inserted.

11 (a), when the first coil end 11 and the second coil end 12 are initially inserted into the first twisting jig 1 and the eighth twisting jig 2 , the second coil end 12 is gradually moved away from the third coil end 13 by the extension 32 of the second twisting jig 2 .

As shown in FIG. 11 ( b ), the first coil end 11 and the second coil end 12 can be gradually inserted into the first twisting jig 1 and the second twisting jig 2 . There, the first coil end 11 is bent in a minute curve by the streamlined portion of the outer surface 92 of the inner guide 9 , and is inserted into the first twisting jig 1 .

As shown in FIG. 11 ( c ), the first coil end 11 and the second coil end 12 can be maximally inserted into the first twisting jig 1 and the second twisting jig 2 . and the first coil end 11 and the second coil end 12 include a first twisting jig 1 and a second twisting jig 2, a third twisting jig 3, and an inner guide ( 9), the shape of the hairpin can be completed.

12 is a plan view illustrating the stator manufacturing equipment according to another embodiment of the present invention, and FIG. 13 is a side view showing the stator manufacturing equipment according to another embodiment of the present invention.

The stator manufacturing equipment may include a pallet 100 .

The pallet 100 may be moved in a shuttle manner along a work line connecting the plurality of work areas S1 to S8.

The plurality of work areas include an input area (S1), a finger loading area (S2), an expansion area (S3), a return area (S4) (S5), a twisting area (S6), and a finger unloading area ( S7) and a discharge region S8 may be included.

The input area S1 may be an area in which the stator is put on the pallet 100 .

The finger loading area S2 may be an area in which the upper finger UF holds the stator on the pallet 100 , in particular, the stator core SC (refer to FIG. 1 ).

The expansion area S3 may be an area in which the expansion unit 120 spreads the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18 by two bundles.

The return areas S4 and S5 may be areas through which the stator of the expansion area S2 passes to move the twisting area S5.

The twisting region S6 may be a region in which the twisting unit 130 twists the plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18. .

The unloading area S7 may be an area in which the upper finger UF is separated from the stator.

The discharge area S8 may be an area in which the pallet 100 waits for the stator from which the upper finger UF is separated to be taken out.

The pallet 100 includes a finger loading area S2, an expansion area S3, a return area S4 and S5, a twisting area S6, and a finger unloading area S7 in the input area S1. ) and may be sequentially moved to the discharge area S8, and may be moved from the discharge area S8 to the input area S1 again.

A plurality of pallets 100 may be provided to simultaneously manufacture a plurality of stators, for example, eight pallets may be provided. The plurality of pallets 100 may be sequentially moved along the work line.

The pallet 100 may be lifted in some of the plurality of work areas, and the stator manufacturing equipment may further include a pallet elevating mechanism such as a motor or a cylinder capable of elevating the pallet 100 .

The stator manufacturing equipment may include a core transfer device 110 .

The core transfer device 110 can put the stator, particularly the stator core SC (see FIG. 1) into which the hairpins are inserted, into the pallet 100 located in the input area S1, and the pallet located in the discharge area S8 (S8). 100) may discharge the stator (hereinafter referred to as a core).

The core transfer device 100 may include a core lower 102 capable of loading or unloading a core, and a core chuck 104 capable of chucking a core.

An example of the core lower 102 may be a two-axis robot of the X-axis and the Z-axis.

An example of the core chuck 104 may include a cylinder such as a hydraulic cylinder or a pneumatic cylinder.

The stator manufacturing equipment may include an upper finger module 120 .

The upper finger module 120 may include an upper finger (UF, see FIG. 1 ) for holding the core loaded on the pallet 100 .

The upper finger module 120 includes an upper finger chuck 122 for chucking the upper finger UF, an upper finger loader/unloader 124 for loading/unloading the upper finger, and locking/unlocking the upper finger An upper finger locker 126 may be included.

The upper finger (UF) holds the core in the finger loading area (S2), and together with the core, the expansion area (S3), the return area (S4) (S5), the twisting area (S6), the finger unloading area ( S7), and after being separated from the core in the finger unloading area S7, it may be moved back to the finger loading area S2.

The stator manufacturing equipment may include an expansion unit 130 .

The expansion unit 130 may be disposed in the expansion area S3, and a plurality of coil ends 11, 12, 13, 14, 15, 16, and 16 of the core moved in the finger loading area S2. 17)(18) can be spread apart by 2 bundles. The expansion unit 130 includes a pipe expansion jig that holds two coil ends among a plurality of coil ends 11, 12, 13, 14, 15, 16, 17, and 18, and a pipe expansion jig that moves the expansion jig. It may include a driving mechanism.

An insertion part into which two coil ends can be inserted may be formed in the expansion jig.

The tube expansion driving mechanism includes a servomotor 134 and a reducer, and is connected to the tube expansion jig to move the two coil ends away from the rest.

The pipe expansion drive mechanism and the pipe expansion jig can spread a plurality of coil ends step by step by spreading the coil ends two by one.

The stator manufacturing equipment may include a twisting unit 140 .

The twisting unit 140 may be disposed in the twisting area S6 . Twisting unit 140 may include a plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8), a plurality of twisting jigs (1) (2) )(3)(4)(5)(6)(7)(8) may include a rotating mechanism capable of rotating each independently.

The rotating mechanism may include a server motor and a speed reducer, and may be provided for each of a plurality of twisting jigs (1) (2) (3) (4) (5) (6) (7) (8).

The rotating mechanism may be provided with the same number as the twisting jigs (1) (2) (3) (4) (5) (6) (7) (8).

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments.

The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1,2,3,4,5,6,7,8: Twisting jig 9: Inner guide
10: outer guide 11,12,13,141,51,61,71,8: coil end
32,34,36: extension

Claims (9)

a plurality of twisting jigs having an insertion portion into which the coil end of the hairpin is inserted and corresponding 1:1 with the coil end;
an inner guide for guiding the innermost coil end among the plurality of coil ends; and
and an outer guide disposed outside the inner guide and guiding the outermost coil end among the plurality of coil ends,
A stator manufacturing equipment having an extension spaced apart between an even-numbered coil end and an odd-numbered coil end of a plurality of coil ends is formed in at least one of the even-numbered twisting jigs among the plurality of twisting jigs. The method of claim 1,
The stator manufacturing equipment having an inlet of a shape that the extension portion gradually becomes thinner toward the upper side. The method of claim 1,
The inlet portion has an inclination angle of 15° to 25°. The method of claim 1,
The coil end includes a peeling skin without a coating layer, and a slope skin having a coating layer,
The stator manufacturing equipment having an inclination angle of 15° to 25° at the tip angle of the stripping skin. The method of claim 1,
The coil end includes a peeling skin without a coating layer, and a non-removing part having a coating layer,
When the coil end is fully inserted into the insertion part in the lower part of the extension part, the stator manufacturing equipment is formed with a step facing the periphery of the stripping skin. The method of claim 1,
The coil end includes a peeling skin without a coating layer, and a slope skin having a coating layer,
A stator manufacturing equipment having a contact portion in contact with the stripping skin when the coil end is completely inserted into the insertion portion in the odd-numbered twisting jig among the plurality of twisting jigs. 7. The method of claim 6,
The stator manufacturing equipment has a lower upper end height of the contact portion than the upper end height of the extension portion. The method of claim 1,
A gap through which the plurality of coil ends pass is formed between the outer surface of the inner guide and the inner surface of the outer guide,
A stator manufacturing equipment in which an outer surface of the inner guide and an inner surface of the outer guide are respectively convex. 9. The method of claim 8,
Each of the outer surface of the inner guide and the outer surface of the outer guide includes a guide inlet, and an angle of the guide inlet has an inclination angle of 15° to 25°.

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