Coil separation method and coil separation device

Abstract

The present invention provides a coil separation method and a coil separation device, which can easily separate a coil from a stator without forcibly deforming the coil. The coil separation method of the present invention separates a coil (120) from a stator (100), wherein the stator (100) includes a stator core (110) having a plurality of slots (112) formed on the inner circumference thereof, and a coil (120) installed in the plurality of slots (112); the coil separation method cuts off a coil end (120b) of the coil (120) protruding from a first end face (110a) in the central axis direction of the stator core (110), and presses the coil (120) in any of the plurality of slots (112) from the first end face (110a) of the stator core (110) where the coil end (120b) is cut off, thereby moving the coil (120) along the central axis direction of the stator core (110) and taking it out from a second end face (110b) of the stator core (110).

Description

Technical Field

[0001] The invention relates to a coil separation method and a coil separation device. Background Art

[0002] In recent years, from the viewpoint of protecting the global environment, attempts have been made to separate coils from stators and recycle them instead of discarding used stators of rotating electrical machines.

[0003] In the past, as a method for separating the coil from the stator, the following method is known: the coil ends protruding from the two end surfaces in the direction of the central axis of the stator core are pressed radially inward until the coil is detached from the slot, and then it is removed from the axial hole of the stator core (for example, refer to patent document 1).

[0004] [Prior Technical Literature]

[0005] (Patent Document)

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-13222 Summary of the invention

[0007] [Problems to be solved by the invention]

[0008] In particular, compared with the coils used in the stators of rotating electric machines for household appliances, the coil density of the coils used in the stators of rotating electric machines for vehicles is high, and the coils are bonded to each other using varnish or the like. Therefore, when the coil is forcibly deformed, the outer surface of the coil end must be pressed strongly. Since it is necessary to press at multiple circumferential positions of the annular coil end, large pressure devices must be arranged at multiple circumferential positions of the stator. Therefore, the enlargement of the separation device is inevitable. In addition, a lot of force is required to separate the coil from the stator. Therefore, it is difficult to pull the coil out of the stator along the center axis direction, for example.

[0009] Furthermore, in the method of forcibly deforming the outer surface of the coil end by strongly pressing it, impurities other than the coil are easily attached to the coil surface. If impurities are attached to the coil, when the coil removed from the stator is melted for recycling, the impurity concentration in the melt increases, which may limit the scope of recycling the coil.

[0010] An object of the present invention is to provide a coil separation method and a coil separation device, which can easily separate a coil from a stator without forcibly deforming the coil.

[0011] [Technical means to solve the problem]

[0012] (1) A coil separation method, which separates a coil from a stator (for example, stator 100 described below), wherein the stator includes a stator core (for example, stator core 110 described below) having a plurality of slots (for example, slots 112 described below) formed on an inner circumferential surface, and a coil (for example, coil 120 described below) mounted in the plurality of slots; the coil separation method includes cutting off a coil end (for example, coil end 120b) of the coil protruding from a first end face (for example, first end face 110a) in a central axis direction (for example, X1-X2 direction described below) of the stator core, pressing the coil in any of the plurality of slots from the first end face side of the stator core where the coil end is cut off, thereby moving the coil in the central axis direction of the stator core and removing it from the second end face of the stator core.

[0013] According to the above (1), there is no need to press the outer surface of the coil end to forcibly deform it. Therefore, the impurities contained in the removed coil will not increase, and there is no need to worry about limiting the scope of recycling of the coil. In addition, since the coil in the slot is pressed, the coil can be smoothly moved along the central axis direction of the stator core while being supported by the inner wall surface of the slot, so that it can be easily separated from the stator.

[0014] (2) According to the coil separation method described in (1) above, when cutting the coil end, the straight portion of the coil protruding from the first end surface of the stator core (for example, the straight portion 120a described below) can be cut.

[0015] According to the above (2), the coil in the slot is prevented from interfering with the inner wall surface of the slot. Therefore, the coil can be moved more smoothly along the central axis direction of the stator core, and there is no need to apply a large pressing force to the coil unnecessarily.

[0016] (3) According to the coil separation method described in (1) or (2) above, the second end face of the stator core can also be supported in a state where a storage space (for example, the coil storage groove 21 described below) for the coil taken out from the second end face of the stator core is configured when the coil is pressed.

[0017] According to the above (3), the clean coil taken out from the stator can be easily recovered by the storage space.

[0018] (4) A coil separation device (e.g., coil separation device 1 described below) that separates a coil from a stator (e.g., stator 100 described below), wherein the stator includes a stator core (e.g., stator core 110 described below) having a plurality of grooves (e.g., grooves 112 described below) formed on an inner peripheral surface thereof, and a coil (e.g., coil 120 described below) mounted in the plurality of grooves; the coil separation device includes: a configuration member (e.g., configuration jig 2 described below) that configures the stator at a specific position, the stator being a first end face (e.g., The coil end of the aforementioned coil protruding from the aforementioned first end face 110a) (for example, the aforementioned coil end 120b) is in a state where it is cut off; and a pressing member (for example, the aforementioned pressing jig 3) has a plurality of pressing parts (for example, the aforementioned pressing part 32), and the pressing parts are configured to be able to be inserted into any of the aforementioned plurality of grooves from the aforementioned first end face side of the aforementioned stator core; and the aforementioned pressing member moves the aforementioned coil along the central axis direction of the aforementioned stator core and removes it from the aforementioned second end face side of the aforementioned stator core by inserting the aforementioned plurality of pressing parts into the aforementioned grooves and pressing the aforementioned coil.

[0019] According to the above (4), when the coil is taken out from the stator, the outer surface of the coil end is not pressed to forcibly deform it. Therefore, the impurities contained in the taken-out coil will not increase, and there is no need to worry about limiting the scope of recycling of the coil. Since the coil in the slot is pressed, the coil can be smoothly moved along the central axis direction of the stator core while being supported by the inner wall surface of the slot, so that it can be easily separated from the stator.

[0020] (5) According to the coil separation device described in (4) above, it may also have a phase adjustment component (for example, the following rotation mechanism), which adjusts the phase of the aforementioned multiple slots and the aforementioned multiple pressing components by rotating at least any one of the aforementioned configuration component and the aforementioned pressing component around the central axis of the aforementioned stator core (for example, the following central axis X).

[0021] According to the above (5), the phases of the plurality of grooves and the plurality of pressing members can be easily aligned.

[0022] (6) The coil separation device according to (4) or (5) above, wherein the arrangement member has a stator support surface (for example, the stator support surface 2a described below), and the stator support surface abuts against the second end surface of the stator core to support the stator.

[0023] According to the above (6), the coil in the slot portion can be stably pressed by the pressing member while the stator is supported.

[0024] (7) A coil separation device according to any one of (4) to (6) above, wherein the configuration member may have a coil receiving groove (for example, the coil receiving groove 21 described below), wherein the coil receiving groove receives the coil taken out from the second end face of the stator core.

[0025] According to the above (7), the clean coil taken out from the stator can be easily recovered by using the coil storage groove.

[0026] (8) According to the coil separation device described in (7) above, the housing groove may be formed in the stator support surface in an annular shape corresponding to the outer shape of the coil.

[0027] According to the above (8), the coil taken out from the stator can be smoothly collected into the coil storage slot along the outer shape of the annular coil without causing deformation or damage.

[0028] (Effects of the Invention)

[0029] According to the present invention, a coil separation method and a coil separation device can be provided, which can easily separate the coil from the stator without worrying about foreign matter adhering to the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a perspective view showing a stator.

[0031] Figure 2 is a schematic diagram showing a coil separation device.

[0032] Figure 3 It is a perspective view showing a configuration jig.

[0033] Figure 4 It is a bottom view showing the pressing jig.

[0034] Figure 5 The figure shows the process of cutting the coil end portions protruding from the stator core.

[0035] Figure 6 It is a schematic diagram showing a state where a stator is arranged in the coil separation device.

[0036] Figure 7 It is a diagram showing the process of separating the coil from the stator.

[0037] Figure 8 This is a diagram showing the coil in the slot portion pressed by the pressing member.

[0038] Fig. 9 It is a diagram showing the process of separating the coil from the stator.

[0039] Fig.10It is a diagram showing the process of separating the coil from the stator. DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 1 is a perspective view of a stator 100 according to the present embodiment. The stator 100 includes a stator core 110 and a coil 120 .

[0041] Here, the directions shown in the figures are explained. The X1-X2 direction is the direction of the central axis of the stator 100 and the stator core 110. The X1-X2 direction is the linear movement direction of the pressing fixture 3. In each figure, the X1 direction represents the upper direction and the X2 direction represents the lower direction. However, the X1-X2 direction is not necessarily limited to the upper direction and the lower direction along the gravity direction. The X1-X2 direction can be a direction inclined relative to the gravity direction, or can be, for example, a horizontal direction.

[0042] The stator core 110 is formed by laminating a plurality of thin electromagnetic steel sheets having a substantially annular shape and an opening in the center. Figure 1 As shown, the stator core 110 has an axial hole 111 at the center thereof. The stator core 110 has a first end surface 110a facing in the X1 direction along the central axis direction, and a second end surface 110b facing in the X2 direction.

[0043] The stator core 110 has a plurality of grooves 112 radially formed at equal intervals on the inner circumference facing the shaft hole 111. The grooves 112 are narrowly opened toward the shaft hole 111. The grooves 112 pass through the stator core 110 in a straight line along the central axis direction and are opened on the first end face 110a and the second end face 110b respectively.

[0044] In the stator core 110, a plurality of through holes 113 are formed which penetrate along the central axis direction. Figure 1 The stator core 110 shown in the figure has six through holes 113 arranged at equal intervals in the circumferential direction. The six through holes 113 are arranged outside the slot portion 112 in the radial direction of the stator core 110 .

[0045] The coil 120 is a collection of conductors composed of a plurality of rectangular wires, and is mounted in each slot 112 of the stator core 110. The coil 120 has a straight portion 120a and coil ends 120b and 120c. Figure 1Only one straight portion 120a is shown by a dotted line. Multiple straight portions 120a are respectively accommodated in each slot portion 112. Coil ends 120b and 120c protrude in annular shapes from the first end face 110a and the second end face 110b of the stator core 110, respectively. The coil ends 120b and 120c are conductors protruding from the slot portion 112 and extending to other slot portions 112 spaced apart in the circumferential direction of the stator core 110, respectively, and are formed by bending the conductor into a mountain shape. Insulating paper 114 is accommodated in the slot portion 112 so as to cover the straight portions 120a, respectively.

[0046] The coil 120 may be composed of a plurality of segment coils each having a pair of straight portions 120 a , or may be composed of a plurality of continuous coils in which a conductor is wound in a wave-like manner along the circumferential direction of the stator core 110 .

[0047] Next, refer to Figure 2 to Figure 4 The coil separation device 1 includes a placement jig 2 and a pressing jig 3 .

[0048] The arrangement jig 2 is a jig for supporting the stator 100 on which the coil 120 is mounted, and constitutes an arrangement member in the coil separation device 1. Figure 2 and Figure 3 As shown, the placement jig 2 is made of metal such as stainless steel and is formed into a cylindrical shape having a diameter larger than the outer diameter of the stator core 110 .

[0049] The placement jig 2 has a flat stator support surface 2 a. The stator support surface 2 a is disposed on one end surface of the placement jig 2 in the central axis direction. Figure 2 In the embodiment, the stator support surface 2a is formed by the upper end surface of the configuration jig 2. The stator support surface 2a supports the stator 100 by abutting or placing a portion of the stator core 110 in the stator 100 when the coil is separated, specifically, the second end surface 110b of the stator core 110. The stator support surface 2a is a flat surface perpendicular to the axial direction of the configuration jig 2.

[0050] The stator support surface 2a is provided with a coil storage groove 21. The coil storage groove 21 constitutes a storage space for the coil 120 taken out from the stator core 110. The coil storage groove 21 is formed in an annular shape along the outer shape of the coil 120 installed in the stator 100. The coil storage groove 21 is recessed from the stator support surface 2a along the axial direction of the configuration jig 2.

[0051] The inner diameter of the coil storage groove 21 is less than the inner diameter of the coil end portions 120b, 120c, and the outer diameter of the coil storage groove 21 is greater than the outer diameter of the coil end portions 120b, 120c. The difference between the outer diameter and the inner diameter of the coil storage groove 21 is greater than the radial length of the groove portion 112 of the stator core 110. The depth of the coil storage groove 21 is greater than the length in the central axis direction of the coil 120 taken out of the stator 100 as described below, measured from the stator support surface 2a. Therefore, the coil storage groove 21 can accommodate the entire coil 120 taken out of the stator 100.

[0052] A circular recess 22 is arranged at the center of the configuration jig 2, which is further inside than the coil storage groove 21. The recess 22 is recessed at a specific depth from the stator support surface 2a. The inner diameter of the recess 22 is less than the inner diameter of the axial hole 111 of the stator core 110. The depth of the recess 22 is equal to the depth of the coil storage groove 21.

[0053] Six support pillar insertion holes 23 are formed at equal intervals along the circumferential direction of the configuration jig 2 on the stator support surface 2a further outside the coil storage groove 21. The support pillar insertion holes 23 are holes for erecting the guide pillars 5 described below when the coils 120 are separated from the stator 100. The six support pillar insertion holes 23 are provided corresponding to the positions of the six through holes 113 formed in the stator core 110.

[0054] The configuration jig 2 can be set at a specific position of the coil separation device 1 while maintaining a fixed position, or it can be configured to be moved by a moving mechanism such as a robot or a slide (not shown) when the coil separation action is performed, so as to be configured at a specific position of the coil separation device 1.

[0055] The pressing jig 3 is a jig for pressing the coil 120 out of the slot 112 of the stator core 110, and constitutes a pressing member in the coil separation device 1. The pressing jig 3 is formed of a metal such as stainless steel. The pressing jig 3 is arranged in the coil separation device 1 in a manner opposite to the stator support surface 2a where the jig 2 is arranged. Figure 2 and Figure 4 As shown, the pressing jig 3 includes a disc-shaped jig base 31 and a plurality of thin plate-shaped pressing members 32 .

[0056] The jig substrate 31 is mounted on a pressure device that is linearly moved by a cylinder or the like (not shown). Thus, the jig substrate 31 is configured to be able to move linearly along the central axis direction of the stator 100. Six support through holes 33 are formed in the jig substrate 31 at equal intervals along the circumferential direction. The support through holes 33 are holes through which the guide support 5 described below is inserted when the coil 120 is separated from the stator 100. The six support through holes 33 are provided corresponding to the positions of the six through holes 113 formed in the stator core 110.

[0057] like Figure 2and Figure 4 As shown, a plurality of pressing members 32 are radially arranged at equal intervals around the central axis X of the jig substrate 31. A plurality of pressing members 32 are fixed to the jig substrate 31 in a manner of protruding from the jig substrate 31 in the same direction. The lengths of the pressing members 32 in the protruding direction are all the same. The length of the pressing member 32 in the protruding direction is greater than the length of the groove 112 in the central axis direction of the stator core 110. The length of the pressing member 32 in the radial direction of the jig substrate 31 is shorter than the depth of the groove 112 in the radial direction of the stator core 110. The front end surface of the pressing member 32 is a flat surface perpendicular to the protruding direction of the pressing member 32.

[0058] The number and arrangement of the pressing members 32 are consistent with the number and arrangement of the slots 112 of the stator core 110. The cross-sectional shapes of the pressing members 32 when cut in a direction perpendicular to the direction of the central axis X of the jig substrate 31 are the same. The cross-sectional shape of the pressing member 32 is slightly smaller than the opening shape of the slots 112 opened at the first end face 110a and the second end face 110b of the stator core 110. Therefore, the pressing members 32 can be respectively inserted into the corresponding slots 112 from the first end face 110a side of the stator core 110.

[0059] The coil separation device 1 is at least in the coil separation action, such as Figure 2 As shown, the arrangement jig 2 and the pressing jig 3 are arranged coaxially along the central axis X. At least one of the arrangement jig 2 and the pressing jig 3 is configured to be rotatable around the respective central axes X by the action of a rotation mechanism (not shown). This rotation mechanism constitutes a phase adjustment member in the coil separation device 1.

[0060] Next, refer to Figures 5 to 10 A coil separation method using the coil separation device 1 will be described.

[0061] First, if Figure 5 As shown, for the stator 100, a cutting device having a rotating blade 41 is used to cut off the coil end 120b protruding from the first end face 110a of the two coil ends 120b and 120c of the stator core 110. The rotating blade 41 cuts off the coil end 120b from the outer circumference or inner circumference of the coil end 120b along a cutting line CL parallel to the first end face 110a to separate the coil end 120b.

[0062] The cutting line CL is set at a position close to the first end face 110a. Generally speaking, the ends of the coil ends 120b, 120c of the straight portion 120a arranged in the groove portion 112 slightly protrude from the first end face 110a and the second end face 110b. The cutting line CL is set at the position of the straight portion 120a protruding from the first end face 110a. Therefore, in each groove portion 112 arranged in the first end face 110a after the coil end 120b is cut off, only the end of the straight portion 120a of the coil 120 that has not been cut off is exposed. The coil end 120c protruding from the second end face 110b remains on the stator 100 together with the straight portion 120a of the coil 120 in the groove portion 112.

[0063] Then, if Figure 6 As shown, the stator 100 after the coil end 120b is cut off is transported to a specific position of the coil separation device 1 by the action of a transport device such as a robot (not shown). In detail, the stator 100 is arranged between the arrangement jig 2 and the pressing jig 3 by the action of the transport device. At this time, the first end face 110a of the stator core 110 is opposite to the pressing jig 3, and the second end face 110b is opposite to the arrangement jig 2.

[0064] When the stator 100 is arranged, the straight rod-shaped guide pillars 5 are respectively inserted into the six pillar insertion holes 23 of the arrangement jig 2. The six guide pillars 5 are vertically erected from the stator support surface 2a of the arrangement jig 2. The guide pillars 5 may also be erected in the arrangement jig 2 in advance.

[0065] The six guide pillars 5 are inserted into the six through holes 113 of the stator 100. Thus, the stator 100 is positioned relative to the configuration jig 2. In the positioned state, the stator 100 is moved toward the configuration jig 2 along the guide pillars 5 by the action of the transport device (not shown). Then, the second end face 110b of the stator core 110 is brought into contact with the stator support face 2a of the configuration jig 2. Thus, as shown in FIG. Figure 7 As shown, the stator 100 is supported by the placement jig 2 . In a state where the stator 100 is supported by the placement jig 2 , the coil ends 120 c remaining in the stator 100 are accommodated in the coil accommodation grooves 21 of the placement jig 2 .

[0066] After the stator 100 is supported by the configuration jig 2, at least one of the configuration jig 2 and the pressing jig 3 supporting the stator 100 is rotated around the central axis X by the action of a rotating mechanism (not shown). Thus, the coil separation device 1 performs phase alignment between the plurality of pressing members 32 provided in the pressing jig 3 and the plurality of slots 112 formed in the stator core 110. By the phase alignment, the positions of the plurality of slots 112 and the positions of the plurality of pressing members 32 are adjusted to be consistent along the central axis direction of the stator 100.

[0067] After the phase is adjusted, the pressing jig 3 is moved toward the stator 100 in the X2 direction by the action of a pressure device (not shown). As a result, the six guide pillars 5 passing through the stator 100 are inserted into the six pillar through holes 33 of the pressing jig 3. Thus, the pressing jig 3 is positioned relative to the stator 100.

[0068] When the pressing jig 3 moves further toward the stator 100 in the X2 direction, as shown in FIG. Figure 7 As shown, the front end of each pressing member 32 abuts against the cut surface 120d of the straight portion 120a slightly protruding from the groove portion 112 from the first end face 110a side of the stator core 110. When the pressing jig 3 is further moved along the X2 direction, each pressing member 32 simultaneously presses the straight portion 120a of the coil 120 in the corresponding groove portion 112 in the X2 direction. As a result, the coil 120 slowly moves toward the configuration jig 2 relative to the stator core 110. The stator 100 is supported by the stator support surface 2a of the configuration jig 2, and the stator support surface 2a of the configuration jig 2 is configured to be opposite to the pressing direction. Therefore, the pressing jig 3 can stably press the coil 120 of the stator 100.

[0069] The pressing member 32 presses the linear portion 120a in the corresponding groove 112 as the pressing jig 3 moves, and is inserted into the groove 112. Figure 8 As shown, the pressing member 32 in the groove 112 abuts against all the cut surfaces of the plurality of straight portions 120 a received in the groove 112 , thereby pressing the coil 120 .

[0070] Then, the pressing member 32 moves along the X2 direction in the groove 112 as the pressing jig 3 moves, thereby pressing the straight portion 120a. Figure 8 As shown, the straight portion 120a pressed by the pressing member 32 is supported by the pressing member 32 and the inner wall surface 112a of the groove portion 112, and can move smoothly in the X2 direction along the central axis direction of the stator core 110 without being scattered. The coil 120 is cut by the straight portion 120a, so that interference with the inner wall surface 112a of the groove portion 112 can be suppressed during movement. Therefore, there is no need to use the pressing jig 3 to unnecessarily apply a large pressing force to the coil 120.

[0071] The pressing member 32 is longer than the length of the slot 112 along the central axis direction of the stator core 110. Fig. 9 As shown, when the jig base plate 31 of the pressing jig 3 moves to abut against the first end surface 110a of the stator core 110, the front end of the pressing member 32 protrudes from the second end surface 110b of the stator core 110. As a result, the coil 120 is pressed out of the slot 112 of the stator core 110 at once and taken out from the second end surface 110b side of the stator core 110.

[0072] At this time, the insulating paper 114 covering the straight portion 120a of the coil 120 in the groove 112 is also pressed out together with the coil 120 and taken out from the stator core 110. This is because the resistance between the insulating paper 114 and the straight portion 120a of the coil 120 is greater than the resistance between the insulating paper 114 and the stator core 110. When the coil 120 is heated by a heating furnace, the insulating paper 114 melts together with the varnish applied to the coil 120 and the insulating film on the surface of the coil 120, and can be separated by filtering. Therefore, the insulating paper 114 does not affect the reuse of the base material of the coil 120.

[0073] The removed coil 120 is collected in the coil storage groove 21 of the configuration jig 2. The coil storage groove 21 is formed in an annular shape along the outer shape of the coil 120, so the coil 120 removed from the stator core 110 can be easily stored in a clean state without deformation or damage.

[0074] Then, if Fig.10 As shown, the pressing jig 3 moves in the X1 direction so as to be away from the placement jig 2. As a result, the pressing jig 3 returns to the initial position, and the separation operation is completed.

[0075] According to the coil separation method and coil separation device 1 of this embodiment, it is not necessary to press the outer surface of the coil ends 120b, 120c to forcibly deform them to separate the coil 120 from the stator 100. Therefore, no impurities will be attached to the removed coil 120, and there is no need to worry about limiting the scope of recycling of the coil. Only one pressing jig 3 is sufficient for separating the coil 120 from the stator 100, so the device will not be unnecessarily large.

[0076] The pressing jig 3 only linearly presses the coil 120 with the pressing member 32, and therefore, it is sufficient as long as it has a function of linear movement relative to the stator 100. Therefore, for example, compared with the case where the coil 120 is pulled out from the stator 100, there is no need to add an additional mechanism such as a clamp mechanism for pulling out the coil 120, and the device structure is simplified.

[0077] In the above embodiment, the guide pillars 5 are used to position the jig 2, the pressing jig 3 and the stator 100, but the guide pillars 5 may only position the jig 2 and the stator 100. The guide pillars 5 may not necessarily be provided.

[0078] A plurality of arrangement jigs 2 may be prepared in the coil separation device 1, wherein the plurality of arrangement jigs 2 have stator support surfaces 2a and coil storage grooves 21 of sizes corresponding to the size of the stator 100, the outer shapes of the coil ends 120b, 120c, etc. Therefore, the coil separation device 1 may be configured to select the optimal arrangement jig 2 according to the type of the stator 100 to be separated.

[0079] A plurality of pressing jigs 3 may be prepared in the coil separation device 1, and the plurality of pressing jigs 3 may have pressing parts 32 of sizes and numbers corresponding to the size of the stator 100, the number of slots 112 of the stator core 110, etc. Therefore, the coil separation device 1 may be configured to select the best pressing jig 3 according to the type of the stator 100 to be separated.

[0080] The plurality of pressing members 32 provided in the pressing jig 3 are not limited to being the same number as the number of the slots 112 of the stator core 110. The pressing members 32 may be provided in the jig substrate 31 in a number smaller than the number of the slots 112, as long as they can press the coils 120 in any plurality of slots 112 formed in the stator core 110.

[0081] The plurality of pressing members 32 provided in the pressing jig 3 are not limited to all having the same length in the protruding direction. The pressing jig 3 may also include pressing members 32 with different lengths in the protruding direction so that there is a time difference when pressing the straight portions 120a in different grooves 112.

[0082] The front end surface of the pressing member 32 provided in the pressing jig 3 is not limited to a flat surface perpendicular to the protruding direction. The front end surface of the pressing member 32 may also be an inclined surface inclined with respect to the radial direction of the stator core 110, so that there is a time difference when pressing the plurality of straight portions 120a in the same groove portion 112 in the radial direction.

[0083] Reference numerals

[0084] 1. Coil separation device

[0085] 2 Configuration fixture (configuration component)

[0086] 2a Stator support surface

[0087] 21 Coil storage slot

[0088] 3 Pressing fixture (pressing component)

[0089] 32 Pressing parts

[0090] 100 Stator

[0091] 110 stator core

[0092] 110a First end surface

[0093] 112 Groove

[0094] 120 Coil

[0095] 120a Straight section

[0096] 120b coil end

Claims

1. A coil separation method, which separates a coil from a stator, wherein the stator comprises a stator core having a plurality of slots formed on an inner circumference thereof, and a coil mounted in the plurality of slots; the coil separation method is characterized by: cutting off the coil end portion of the coil protruding from the first end surface in the central axis direction of the stator core, The coil in any of the plurality of slots is pressed from the first end face side of the stator core where the coil ends are cut off, thereby moving the coil along the central axis direction of the stator core and taking it out from the second end face of the stator core.

2. The coil separation method according to claim 1, wherein: When the coil end portion is cut, a straight portion of the coil protruding from the first end surface of the stator core is cut.

3. The coil separation method according to claim 1 or 2, wherein: When the coil is pressed, the second end surface of the stator core is supported in a state where a storage space for the coil taken out from the second end surface of the stator core is arranged.

4. A coil separation device for separating a coil from a stator, wherein the stator comprises a stator core having a plurality of slots formed on an inner circumference thereof, and a coil mounted on the plurality of slots; the coil separation device is characterized in that: a configuration member for configuring the stator at a specific position, wherein the stator is in a state where the coil end portion of the coil protruding from the first end surface in the central axis direction of the stator core is cut off; and The pressing member includes a plurality of pressing parts, wherein the pressing parts are configured to be insertable into any of the plurality of slots from the first end surface side of the stator core; and The pressing member inserts the plurality of pressing parts into any of the plurality of grooves and presses the coil, thereby moving the coil along the central axis direction of the stator core and removing the coil from the second end surface of the stator core.

5. The coil separation device according to claim 4, wherein: The coil separation device includes a phase adjustment member that adjusts the phases of the plurality of slots and the plurality of pressing members by rotating at least one of the arrangement member and the pressing member around a central axis of the stator core.

6. The coil separation device according to claim 4 or 5, wherein: The arrangement member includes a stator support surface that abuts against the second end surface of the stator core to support the stator.

7. The coil separation device according to claim 4 or 5, wherein: The arrangement member includes a coil housing groove for housing the coil taken out from the second end surface of the stator core.

8. The coil separation device according to claim 7, wherein: The coil housing groove is formed in the stator supporting surface in an annular shape corresponding to the outer shape of the coil.

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